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Armin Strom · Skeleton

Strap for Tourbillon Skeleton Fire

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm
20 mm strapsAll Armin Strom
Lug width20 mm
Case diameter43 mm
ReferenceRG15-TF.5N
FamilySkeleton
MovementArmin Strom caliber ATC11-S hours, minutes, small seconds | tourbillon escapement, skeleton
Year2015
CaseRose Gold

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

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Straps for the Skeleton RG15-TF.5N

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Skeleton RG15-TF.5N, seen from the bench

The Armin Strom Skeleton RG15-TF.5N represents Bienne's design philosophy: a 43.4mm rose gold case housing a fully skeletonized ATC11-S caliber with tourbillon escapement. The completely transparent movement exposes bridges, gears, and structural elements while maintaining readable hours and minutes through a carefully emptied dial. The 20mm lug width suits medium to generous wrists, and the 5N rose gold (75% gold) provides superior durability with a warm tone that enhances movement texture. The ATC11-S oscillates at 4Hz with adequate power reserve for daily use, while the visible tourbillon improves chronometric stability regardless of wrist position.

Frequently asked questions

What is the exact lug width of the Armin Strom Skeleton RG15-TF.5N?

The lug width of the Armin Strom Skeleton RG15-TF.5N is 20mm. Measure from the inner edge of one lug to the other using a digital caliper or flexible ruler. This specification ensures that any 20mm strap will fit precisely into the case lugs without play or misalignment.

Which strap material pairs best with this model?

For the Armin Strom Skeleton RG15-TF.5N, we recommend genuine alligator in dark brown or cognac tones: the uniform grain of the scales dialogues with the linearity of the skeletonized bridges, whilst rose gold finds perfect aesthetic resonance. Shell cordovan aged naturally is an excellent alternative for those seeking patina evolution over time.

How do I change the strap on this watch?

Strap replacement requires removing the lug spring bars using a dedicated thin-blade tool. Gently insert the ferrule beneath the spring bar head, apply light downward pressure to compress the internal spring, then extract the bar. Insert the new strap into the lugs and reinsert the spring bar from the opposite side until it clicks into place.

Can I use an aftermarket strap on this model?

Yes, any strap with a 20mm lug width is compatible. Milano Straps offers hand-crafted straps in leather, NATO, and rubber specifically designed for this measurement. We recommend straps of at least 1.4–1.6mm thickness to maintain correct visual proportions relative to the 43.4mm case.

What is the average lifespan of a leather strap for this watch?

A quality leather strap with artisanal stitching typically lasts 3–5 years with moderate daily use. Longevity depends on factors such as humidity exposure, frequency of wear, and maintenance. We recommend periodic conditioning with leather-specific creams and storage in dry environments to extend strap life.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only