Sinn · Instrument Chronographs

Strap for Sinn Instrument Chronographs 103ASa

The Pilot Chronograph 103 A Sa takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

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Lug width20 mm
Case diameter41 mm
Reference103ASa
FamilyInstrument Chronographs
MovementETA caliber 7750 Hours, Minutes, Small seconds | Date, Day | Chronograph
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Standard spring bar · length 20 mm · Ø 1.8 mm double flange · fitted with quick release from the factory (source Sinn) · industry standard, no brand part number

Pilot Chronograph 103 A Sa — watch

What I'm asked about the Sinn Instrument Chronographs 103ASa

What strap size does the Sinn Instrument Chronographs 103ASa take?

The Sinn Instrument Chronographs 103ASa needs 20 mm between the lugs, usually 16 mm at the buckle. It's the size I've been fitting on it for years.

Can the strap on the Sinn Instrument Chronographs 103ASa be changed?

Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.

Can I put a leather strap on the Sinn Instrument Chronographs 103ASa?

Yes, in 20 mm leather. On a 41 mm chronograph I like box calf: it holds its shape and carries a substantial case.

Which strap do you recommend for the Sinn Instrument Chronographs 103ASa?

A 20 mm box calf. You'll find it ready in the 20 mm collection. If you'd rather have something built on your wrist, the Casati atelier.

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.

Request an appointment →

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

The atelier's website: casatimilano.com