Sinn Instrument Chronographs

Most Sinn Instrument Chronographs references take a 20 mm watch strap: 29 of 50. The lug width follows the case size: 39 mm case → 20 mm, 41 mm case → 20 mm, 43 mm case → 22 mm and 44 mm case → 22 mm.

Shop 20 mm Shop 22 mm

Sinn Instrument Chronographs lug width by case size

50 references measured. Updated 2026-10-30.

Case	Lug width	References	Watch strap attachment	For example
38 mm	20 mm	1	—	901.010
39 mm	20 mm	5	—	356.020, 356.070, 356.072
40 mm	20 mm	4	—	756.010, 756.014, 756.030
41 mm	20 mm · 22 mm on 3	22	—	103.031, 103.0601, 103.061
42 mm	22 mm	3	—	358.060, 358.061, 910.010
43 mm	22 mm	7	—	757.010, 757.011, 757.017
44 mm	22 mm	7	—	140.020, 140.030, 900.011
47 mm	22 mm	1	—	950.011

References that take a different watch strap

903.040: 22 mm, not the 20 mm of most 41 mm cases
903.042: 22 mm, not the 20 mm of most 41 mm cases
903.045: 22 mm, not the 20 mm of most 41 mm cases

Questions about the Sinn Instrument Chronographs

Do all Sinn Instrument Chronographs case sizes take the same watch strap?

No. The lug width changes with the case size: the 39 mm case takes 20 mm, the 41 mm case takes 20 mm, the 43 mm case takes 22 mm and the 44 mm case takes 22 mm. Check your case diameter before you buy.

Can two Sinn Instrument Chronographs watches with a 41 mm case take different watch straps?

Yes. Of the 22 Sinn Instrument Chronographs references with a 41 mm case, 19 take 20 mm and 3 take 22 mm. The reference number decides, not the case size alone.