Technical Archive

Armin Strom
Skeleton ST15-PW.05— lug 20mm

Armin Strom Skeleton ST15-PW.05: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Skeleton Pure Water

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Armin Strom ST15-PW.05
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

ST15-PW.05

Movement

Armin Strom caliber ARM09-S Pure Hours, Minutes, Small Seconds | Power Reserve Indicator, Skeleton

The Heritage

The Armin Strom Skeleton ST15-PW.05 is a Swiss manufacture timepiece featuring a skeletonized dial that reveals the ARM09-S caliber in complete transparency. The automatic movement with manual winding displays hours, minutes, small seconds, and power reserve indicator, all visible from the dial and caseback. The watch features a 43.40mm stainless steel case with a 20mm lug width, designed to maintain visual linearity without compromising the movement's protection and dynamic balance on the wrist.

FAQ

What is the lug width of the Armin Strom Skeleton ST15-PW.05?

The lug width of the Armin Strom Skeleton ST15-PW.05 is 20mm. This is the internal distance between the two spring bars that hold the strap to the case. It is essential to verify this measurement before ordering a strap to ensure there is no dangerous play for the movement or forcing that would compromise comfort on the wrist.

What is the best strap for the Armin Strom Skeleton ST15-PW.05?

For the Skeleton, high-quality alligator is the natural choice: the irregular grain of the leather dialogues elegantly with the geometric complexity of the exposed movement. A black or slate-coloured alligator amplifies the visual effect of the skeleton, creating contrast without aesthetic competition. Vegetable-tanned calf offers a softer alternative, whilst FKM rubber represents the pure technical solution for environments of physical stress.

How do you change the strap on the Armin Strom Skeleton ST15-PW.05?

Changing the strap requires the use of a spring bar removal tool. Insert the tool into the lateral slot of the spring bar to release the spring tension, then extract the spring bar completely. Repeat on the other side of the case. The new strap must be fitted with the same spring bars, ensuring they are fully secured on both sides. Never force during this operation to avoid damage to the case.

Is it possible to use a custom aftermarket 20mm strap on the Armin Strom Skeleton ST15-PW.05?

Yes, it is entirely possible. Milanostraps offers a complete range of artisanal 20mm compatible straps: alligator, shell cordovan, calf, NATO and rubber. Each strap is constructed to high standards to ensure durability and comfort. It is advisable to choose materials and finishes that respect the technical and transparent aesthetics of the Skeleton, in particular black alligator or natural calf.

What is the average lifespan of a leather strap for the Armin Strom Skeleton ST15-PW.05?

Lifespan depends on material and usage. High-quality alligator with vegetable tanning lasts 3-5 years of daily wear, developing a natural patina over time. Calf is slightly less resistant (2-4 years), whilst an FKM rubber strap maintains technical properties for 5-7 years without signs of ageing. Regular maintenance—cleaning with a soft cloth, conditioning the leather every 6-12 months—significantly extends the useful life of the strap.