Specht & Söhne Movements: Which Calibre Is in Your Watch?

Search any marketplace for a Specht & Söhne and the listing will tell you, with total confidence, that it contains a Miyota 8215. Sometimes that is true. More often it is not. The same brand fits Seagull automatics, a jump-hour module, Japanese sweep quartz, two completely different chronograph calibres and a Swiss Ronda — and which one you own is decided by your reference number, not by the badge on the dial.

So we did the tedious thing: opened all 36 Specht & Söhne references we sell and wrote down exactly what each product page states. What follows is the lookup table that exists nowhere else, plus the tests that settle it when a listing stays silent.

What movement is in my Specht & Söhne?

It depends entirely on the model. Across the 36 references we stock, our product pages name at least ten calibres: Miyota and Citizen 8215 automatics, the Seagull ST17 automatic, a Seagull ST17 jump hour, Hattori VX3K quartz, Seiko VH31 and VH60 sweep quartz, a VD53 quartz chronograph, a VK meca-quartz chronograph and a Swiss Ronda. Read your own listing. SteelDive and Pagani Design calibres sit outside this table — that engine is covered in our guide to the Seiko NH35.

Two warnings before the table. First, the calibre can vary by model and occasionally by production run — one independent reviewer opened a Specht and found a DG2813, a Miyota clone. Treat any single teardown as evidence about that watch, not about the whole brand. Second, the table below records what the page says. If your watch disagrees with it, your watch wins, and the identification tests further down will tell you why.

The Specht & Söhne movement list, model by model

Every reference we sell, sorted by model code, with the calibre exactly as the product page names it. Where a page does not state something, the cell says so rather than filling in a plausible guess.

Four things the table quietly proves. One: ten of the thirty-six name a Miyota or Citizen 8215 and an eleventh names an unnumbered Miyota automatic, while eight run the Hattori VX3K quartz — so the marketplace habit of stamping “Miyota 8215” on every Specht listing is wrong roughly two times in three. Two: only three references use a Seagull ST17 automatic, plus two more for the jump hour. It is a speciality here, not the house movement. Three: sixteen of the thirty-six are mechanical and twenty are quartz, which is worth knowing before you buy on the assumption that this is an automatic specialist; if that split matters to you, start with our comparison of automatic and quartz watches. Four: only two pages list a Hardlex crystal rather than sapphire, the SP0006 and the SP0009.

Four entries need a footnote of their own:

• The SP0012 sold as a “Miyota 8012”. There is no 8012 in Miyota’s published catalogue. The honest description is “a Miyota automatic”, most plausibly a relative of the 82 series. We would rather say that than print a reference number that does not exist.
• The two “Swiss Ronda 751” reversibles. Ronda’s current quartz range does not publish a 751, so read the number as unconfirmed and the movement simply as a Swiss Ronda quartz.
• The SP0003. It names its maker and stops there: “Citizen Quartz”, no calibre number. Not stated is not the same as hidden, but it is also not the same as known.
• Three names we cannot corroborate outside the listing — the 5Y20, the 1L45 and the VH60. The VH prefix belongs to a family of sweeping quartz calibres, so expect a four-tick seconds hand on the SP-5980; beyond that we will not publish figures we cannot stand behind.

What those calibres actually are

None of the product pages publishes a beat rate, a power reserve or a hacking spec. Those figures come from the movement makers and hold wherever the calibre is fitted, so they belong in a separate table — not mixed in with what our own listings claim.

Everything in that second table is a movement-maker specification, not a Specht claim. Real-world rate on a mechanical calibre is a different question: the 8215 is factory-rated at a very loose −20/+40 seconds a day, and owners typically report something nearer −10 to +25.

How to identify your movement when the listing is silent

Five tests, in the order worth trying. Between them they will separate every calibre on the list above without opening anything.

Count the ticks

Watch the seconds hand for ten seconds. Six steps a second means a mechanical movement beating at 21,600 vph — a Miyota 8215 or a Seagull ST17. Four steps a second is the VH31 or another VH-series sweep quartz. One step a second is ordinary quartz: the VX3K, the Ronda, the VD53. Nothing beats it for speed as a first cut.

A stuttering seconds hand is a signature, not a fault

If the seconds hand shimmies slightly as it advances, you almost certainly have an 8215. That judder comes from the calibre’s indirect-drive layout, it has no effect on timekeeping, and it is the single most common “is my watch broken?” question about this movement. It isn’t. If you want the mechanism behind the hand, our explainer on how an automatic watch actually works covers the gear train.

Try to stop it

Pull the crown out to its furthest position and see whether the seconds hand halts. Older 8215s have no stop-seconds and keep running; production from around 2018 added it, and both are still circulating, so hacking on an 8215 is a maybe rather than a diagnostic. The Seagull ST17 automatics do not hack at all — if your seconds hand keeps sweeping and the dial says automatic with small seconds at six, that is consistent with an ST1701.

One caveat on our own copy: the pages for the Citizen-labelled 8215 models describe the calibre as hacking. Given the split in production, test yours rather than assume.

Look at where the chronograph seconds live

This is the one that separates our two chronographs. On the SP0009 the chronograph seconds hand is mounted in the centre of the dial and snaps back to zero the instant you reset it — the meca-quartz behaviour our guide to hybrid quartz chronographs unpacks in full. On the SP0006 the chronograph reads from a sub-dial instead while a thin central hand runs continuously, which is standard quartz-chronograph behaviour and not meca-quartz, whatever the marketplace copy says.

The SP0009 at $129.99 — central chronograph seconds hand, the giveaway for the VK meca-quartz module.

The SP0006 at $139.99 — same price bracket, different animal: the chronograph reads from the sub-dial.

Read the caseback, then don’t over-read it

Specht casebacks are solid and generic. Ours are marked with the brand, the case material and “JAPAN MOVEMENT” where a Japanese calibre is fitted — no calibre number, no jewel count. That is normal for this price bracket. So is an unmarked rotor on an ST1701: the calibre is typically shipped without engraving, and its absence is not a sign that anything is wrong with your watch.

A typical Specht caseback: brand, material, “JAPAN MOVEMENT” — and no reference number to look up.

Living with each calibre

Short, honest notes on what each one is like to own. For the wider question of whether the watches around them are any good, our Specht & Söhne brand guide handles build quality, dials and bracelets.

Miyota 8215 — and why half the listings say “Citizen”

Miyota is Citizen’s movement division, so “Citizen 8215” on a listing is correct labelling rather than a rebrand. In production since 1975, it is the most repairable, most understood automatic in this price class: quickset date, unidirectional rotor, roughly 42 hours. Accept the stutter and the loose factory tolerance and it will run for years without drama.

SP0033, $207.99 — a Miyota 8215 under a screwed bezel, and the only 100 m rating on the list.

Seagull ST1701 — an automatic, not the manual ST1700

The ST17 in our vintage-styled references is the ST1701: a self-winding calibre with small seconds at six, around 38 to 40 hours, windable by hand but without stop-seconds. The manual-wind member of the family is the ST1700, and that is not what we sell — if a seller describes your SP-1908 as a hand-wound watch, they have the wrong calibre.

SP-1908, $207.99 — small seconds at six is the ST1701 signature.

Seagull ST1721 — the aperture calibre, and the clockwise-only rule

Both jump hours run the ST17 jump-hour variant: the hour is stored in a tension spring and released through a window at twelve while the minutes stay on a central hand. One rule matters more than everything else here. Set the time clockwise only. Turning the hands backwards risks damaging the jumping mechanism, so if you overshoot, keep going forward round the dial.

SP0032, $217.99 — hour in the aperture, minutes on the long hand. The whole affordable jump-hour segment rides on this one calibre; our jump-hour guide explains why.

Hattori VX3K — the quiet workhorse of the catalogue

Eight references run it, which makes it the most-fitted quartz calibre on the list even though nobody writes about it. Our pages describe it as a Japanese Hattori quartz with a date; expect one tick a second and years of battery life. Nothing to learn, nothing to service, nothing to go wrong. It underpins most of the dress and integrated-bracelet quartz models.

Seiko VH31 — quartz that reads as mechanical

Four ticks a second instead of one, which at arm’s length looks like a sweeping automatic. No date, hacking seconds, and a rate of roughly fifteen seconds a month rather than a day. If you want the look of a mechanical dial watch without winding it or setting it after a fortnight in a drawer, this is the calibre to look for on the listing.

VK63 and VK64 — the chronograph that snaps back

Quartz timekeeping, mechanical chronograph module. Pressing reset flips a heart-shaped cam and the central hand slams to zero instantly, which is the tactile part people pay for. There is no chronograph servicing bill at the end of it and no accuracy penalty. Fitted to the SP0009, and the reason that watch punches well above $129.99.

VD53 — a standard quartz chronograph

Superficially similar, mechanically not. The VD53 resets electronically, the chronograph seconds sit in a sub-dial rather than at the centre, and the running seconds take the central hand. It is a perfectly good movement and a cheaper one, but it is not meca-quartz and should never be sold as such. Ours is in the SP0006.

Swiss Ronda — a Swiss movement, not a Swiss watch

Ronda is a genuine Swiss manufacturer and its quartz calibres hold about ten to twenty seconds a month, with batteries lasting several years. One distinction worth keeping: Ronda makes both Swiss Made and Swiss Parts grades, and a Swiss movement inside a Chinese-made case does not make a Swiss Made watch. Ours are in the SP0027 and in the Reversible Swiss Ronda flip-case model.

Which movement should you actually want?

Work backwards from how you will wear it rather than from the badge.

• Best accuracy for the least effort: a VH31 model. Quartz precision, a sweep that doesn’t look like quartz, no winding.
• The mechanical experience on a budget: the Miyota 8215 references, or a Seagull ST1701 if you want small seconds and a bit of Tianjin history on your wrist.
• A chronograph you will actually use: the SP0009 VK chronograph at $129.99. The snap-back reset is the whole point.
• Something nobody else has: the ST1721 jump hours, or the SP0029 Seagull ST17 Sports at $207.99 for an automatic in a sports case at the price most brands charge for quartz.
• An integrated bracelet on a budget: mostly quartz here, which keeps the case thin — the trade-offs are covered in our guide to integrated-bracelet watches under $200.

Servicing, and the part that fails first

There is an advantage buried in that table. Every mechanical calibre on it is a high-volume, parts-available movement, which means a watchmaker can source a replacement rather than rebuild yours. On a sub-$250 watch, dropping in a fresh 8215 is usually cheaper than a full overhaul — the arithmetic behind that is the same one we work through in our piece on what servicing an affordable automatic really costs.

In practice the movement is rarely what goes. Across this price bracket, bracelet hardware and clasps give up first, then crowns and stems that have been pushed sideways, then crystals. Budget for a strap swap long before you budget for a service, and go by the returns and warranty policy stated where you bought the watch.

Specht & Söhne movement questions, answered

Is my Specht & Söhne automatic or quartz?

It depends on the reference. Sixteen of our thirty-six models are mechanical — the Miyota and Citizen 8215 references, the Seagull ST17 automatics and the two jump hours — and the other twenty are quartz. The quickest check without the listing: count the seconds hand’s steps. One step per second is quartz, six is mechanical.

Is the Miyota 8215 a good movement?

Yes, with two caveats worth knowing in advance. Its factory accuracy spec is loose at −20/+40 seconds a day, and older examples have no stop-seconds so the hand keeps running when you pull the crown. In exchange you get a movement in production since 1975, servicing parts everywhere and a reputation for simply not dying.

Why does my seconds hand stutter?

Because you have an 8215. The calibre drives its seconds hand indirectly, which leaves a tiny amount of play, and the hand takes up that play as it advances. It looks like a defect and is not one: timekeeping is completely unaffected, every 8215 ever made does it, and no repair will remove it.

Is the Seagull ST17 a Chinese movement?

Yes — it is made by Tianjin Sea-Gull, the factory that built China’s first wristwatch in 1955. One correction to the story that circulates with it: the ST17 family is a modern design from the early 2000s, developed from the ST16. It is not a 1960s calibre, and nobody should be selling it to you as one.

Find your model

Every reference in the table above is linked to its own page, where the specification block is the version we keep updated. Browse the full Specht & Söhne collection if you would rather shop by shape than by calibre — and if a page ever contradicts what you find inside your watch, tell us and we will fix the page.