Agelocer Replacement Straps: Which Fits Your Model (and Lug Width)

Search "agelocer replacement strap" and you mostly get generic tie-down straps and unrelated luxury-brand pages — nothing that tells you which part actually fits your watch. We stock four original Agelocer replacement straps, each listed for specific references: the Astronomer 29.5-Day Moonphase (6411/6412/6415), the Free-Sprung Flying Tourbillon (9001/9004), the Ice Never Melts Tourbillon (9101S/9104S) and the 920 Tourbillon (9201/9204). All four are $85 and in stock. Here's which one fits your watch, and how to double-check before you order.

Agelocer strap fit chart: model, reference and original strap

Match your model and its reference, not the case diameter, before you order. The four Agelocer models with a dedicated original strap are below; every strap here is $85 and currently in stock.

What size strap does my Agelocer take?

It depends on the model, not the case size. The Astronomer 29.5-Day Moonphase (6411/6412/6415) and the Free-Sprung Flying Tourbillon (9001/9004) both use a 20mm strap. The 920 Tourbillon strap (9201/9204) is listed at 26mm, while the Ice Never Melts strap (9101S/9104S) publishes no width, so order that one by reference number.

The Agelocer Astronomer 29.5-Day Moonphase is a 40mm case, and its own product page lists a 20mm strap width — the same width as the Agelocer Free-Sprung Flying Tourbillon, also a 40mm case, from $799. Same width, but each original strap is listed for its own references only — the Astronomer strap for 6411/6412/6415, the tourbillon strap for 9001/9004 — so order the one that names your watch.

Which original strap fits the Agelocer Astronomer 29.5-Day Moonphase?

The Agelocer Original 20mm Replacement Strap for Astronomer 29.5-Day Moonphase Watch fits all three references — 6411, 6412 and 6415. It's $85, 20mm wide, and comes in grey, black or brown leather, or a silver or rose gold stainless steel bracelet, so you can switch materials without buying a different size.

One note on colour: the strap's own listing also shows a green leather option, but it's currently out of stock, so stick to grey, black or brown if you're ordering leather today.

Can I switch leather for steel on my Agelocer Astronomer?

Yes. The original Astronomer strap is sold as one product with leather and steel options together, including a silver steel and a rose gold steel bracelet alongside the leather versions. Because every option on that listing is the same 20mm width, you can move from leather to a steel bracelet, or back, without a fit problem.

That's a cheaper way to try the steel-bracelet look than buying a different Astronomer reference outright — our Agelocer Astronomer review covers the bracelet versions Agelocer sells as complete watches, if you'd rather compare the whole range first.

What replacement strap fits the Agelocer Free-Sprung Flying Tourbillon?

The Agelocer Original 20mm Replacement Strap for Free-Sprung Tourbillon (9001/9004) fits both references. It's $85, available in black or brown leather or a silver or rose gold steel bracelet, has a 150–220mm wearing length, and is made from genuine leather or 316L stainless steel.

The Free-Sprung Flying Tourbillon itself is a hand-wound Cal.9001, 40mm, 9.7mm thick and 63.5g on its standard leather strap. The replacement strap's 150–220mm wearing length matches the watch's own listed 150–220mm, so either material covers the same wrist range.

What colours does the Agelocer Ice Never Melts replacement strap come in?

The Agelocer Original Rubber Replacement Strap for Ice Never Melts Tourbillon (9101S/9104S) comes in white rubber, black rubber or clear silicone, at $85, and is listed only for the 9101S and 9104S. Agelocer's own strap listing doesn't state a width for this one.

Because no width is published, don't size a generic strap off a guess — order the original by reference. For how the watch itself wears, see our Agelocer Ice Never Melts review.

What width is the Agelocer Sapphire Tourbillon replacement strap?

Agelocer's Original 26mm Clear Silicone Strap for Sapphire Tourbillon (9201/9204) lists a 26mm width on its own product page, in translucent silicone with a 316L stainless steel buckle. It's listed only for the 920 Tourbillon references 9201 and 9204, so confirm you own a 920 Tourbillon before ordering.

Its listed wearing length is 170–230mm, versus 150–220mm on the Free-Sprung Tourbillon strap, so it reaches a slightly larger wrist.

How do I measure my Agelocer's lug width in 60 seconds?

Lug width is the gap between the inside faces of the two lugs where the strap attaches — not the case diameter (40mm on the Astronomer) and not lug-to-lug, which is the tip-to-tip length of the case. Measure the metal, not the leather: with the strap off, a ruler or caliper gives you the number in under a minute.

1. Remove the strap so the gap between the lugs is clear.
2. Lay a ruler or digital caliper across the gap, inside lug face to inside lug face.
3. Read it in millimetres and round to the nearest whole millimetre.
4. Check the result against your reference in the chart above — the Astronomer and Free-Sprung Tourbillon should read 20mm.

Is 1mm off okay? Not for an original replacement. A strap 1mm narrower leaves a visible gap at the lugs, and one 1mm wider won't seat without forcing. Order the width your reference lists.

Many straps also taper, so the buckle end reads narrower than the lug end — measure at the lugs, where the strap actually has to fit. The listings don't say whether these straps use standard spring bars or quick-release pins, so check the underside of your current strap first: a quick-release strap has a small lever you pull back by hand, while a standard spring bar needs a spring-bar tool. For the full step-by-step without scratching the case, see our general watch strap lug width guide.

Should I buy the original Agelocer strap or a generic aftermarket one?

Buy original if you want the strap Agelocer lists for your exact reference, at $85, in the materials Agelocer lists for that reference. A generic 20mm strap will physically fit the Astronomer or Free-Sprung Tourbillon, but it isn't an Agelocer part. For the Ice Never Melts, whose strap listing publishes no width, and the 920 Tourbillon, whose 26mm figure appears only on the strap's own listing, the original ordered by reference number is the safe choice.

All four original straps here are $85 and in stock in our replacement straps collection, alongside the rest of the Agelocer range. If your strap is failing under warranty rather than just worn out, check what Agelocer covers in our Agelocer warranty and servicing guide before you buy a replacement outright.

If you already know your reference, the chart above is the whole decision: match your model, pick your colour or material, and order the $85 original rather than guessing at a generic strap's fit.