INT.S 37 – interchangeable spare parts

INT.S 37 movement

Which spare parts fit the INT.S 37 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

25Parts with interchange data

21Calibers sharing parts

Note: We have compiled this overview to the best of our knowledge and belief, based on the original interchangeability lists of INT.S and the original spare-part labels. All information has been carefully checked but is provided without guarantee. Please verify the interchangeability yourself before fitting, especially the height, diameter and execution of the part.

🔧 Interchangeable parts

Part no.	Description	Also fits
182ISO 20.030	Barrel and cover	FHF 37 FHF 374 FHF 378 INT.S 374 INT.S 378
195ISO 20.060	Barrel arbor	FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 37 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
206ISO 30.015	Center wheel	FHF 37 FHF 374 FHF 378 FHF 37 INT.S 374 INT.S 378
210ISO 30.025	Third wheel	FHF 37 FHF 374 FHF 378 FHF 37 INT.S 374 INT.S 378
227ISO 30.027	Sweep second wheel	INT.S 374 Height 546 FHF 37 FHF 374 Height 546 FHF 37 INT.S 374 Height 571 FHF 37 FHF 374 Height 571 FHF 37 INT.S 374 Height 621 FHF 37 FHF 374 FHF 378 Height 621 FHF 37 INT.S 374 INT.S 378 Height 646 FHF 37 FHF 374 FHF 378 Height 646 FHF 37 INT.S 374 INT.S 378
245ISO 31.080	Cannon pinion with clam notch	INT.S 371 INT.S 372 INT.S 374 Height 173 FHF 37 FHF 371 FHF 372 FHF 374 Height 173 INT.S 371 INT.S 372 INT.S 374 Height 198 FHF 37 FHF 371 FHF 372 FHF 374 Height 198 INT.S 371 INT.S 372 INT.S 374 Height 248 FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 Height 248 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378 Height 273 FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 Height 273 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
255ISO 31.046	Hour wheel	INT.S 371 INT.S 372 INT.S 374 Height 120 FHF 37 FHF 371 FHF 372 FHF 374 Height 120 INT.S 371 INT.S 372 INT.S 374 Height 145 FHF 37 FHF 371 FHF 372 FHF 374 Height 145 INT.S 371 INT.S 372 INT.S 374 Height 198 FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 Height 198 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378 Height 223 FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 Height 223 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
260ISO 31.041	Minute wheel	FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 37 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
307ISO 40.301	Regulator with adjustable stud holder, for flat hairspring	FHF 37 FHF 100.001 FHF 100.151 FHF 100.161 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 37 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
311ISO 70.800	Upper cap jewel with end-piece	FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 37 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
330ISO 70.801	Lower cap jewel with end-piece	FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 37 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
401ISO 51.010	Winding stem	FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 37 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
407ISO 31.121	Clutch wheel	FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 37 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
410ISO 31.120	Winding pinion	FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 37 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
415ISO 31.020	Ratchet wheel	FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 37 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
420ISO 31.023	Crown wheel	FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 37 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
425ISO 51.120	Click	FHF 37 FHF 90-4 FHF 90-5 FHF 90-9 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 905 FHF 908 FHF 909 FHF 90-5 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
430ISO 61.080	Click spring	FHF 37 FHF 90-4 FHF 90-5 FHF 90-9 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 905 FHF 908 FHF 909 FHF 90-5 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
435ISO 51.050	Yoke	INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
440ISO 61.100	Yoke spring	INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
443/1ISO 51.080.06	Setting lever, assembled	FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 37 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
450ISO 31.100	Setting wheel	FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378 FHF 37 INT.S 371 INT.S 372 INT.S 373 INT.S 374 INT.S 378
482ISO 61.092	Setting lever return-spring	FHF 37 FHF 371 FHF 37 INT.S 371
705ISO 30.040	Escape wheel and pinion	FHF 37 FHF 374 FHF 378 FHF 37 INT.S 374 INT.S 378
710ISO 40.010	Jewelled pallet fork and stat	AS 1393 FHF 37 FHF 371 FHF 372 FHF 373 FHF 374 FHF 378

Source: original interchangeability lists of INT.S (checked transcription) and checked original spare-part labels · as of 2026-10-28. Height / execution: the part fits only in this height or execution.

🌀 Matching mainspring

Mainspring dimensions for INT.S 37 (height × diameter × thickness × length) and matching mainspring in our shop:

INT.S 37: 1.40 × 8.0 × 0.085 × 300 mm (GR 3617)

🔗 Movements sharing the most parts

→ All calibers of INT.S

❓ Frequently asked questions

Which INT.S 37 spare parts also fit other movements?

For the INT.S 37, 25 part numbers are listed as interchangeable. Together they fit 21 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the INT.S 37?

The most shared parts: INT.S 374 (35 parts), INT.S 371 (27 parts), INT.S 378 (26 parts).

Which mainspring fits the INT.S 37?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.40 × 8.0 × 0.085 × 300 mm (GR 3617, hand-wound, normal end hook).