INT.S 501 – interchangeable spare parts

INT.S 501 movement

Which spare parts fit the INT.S 501 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

27Parts with interchange data

8Calibers 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	INT.S 50
195ISO 20.060	Barrel arbor	INT.S 50
210ISO 30.025	Third wheel	INT.S 50
245ISO 31.080	Cannon pinion with clam notch	Height 192 INT.S 50
255ISO 31.046	Hour wheel	Height 130 INT.S 50
260ISO 31.041	Minute wheel	INT.S 50
301ISO 40.301	Regulator for flat hairspring	INT.S 50
307ISO 40.301	Regulator with adjustable stud holder, for flat hairspring	INT.S 50
334/1ISO 70.860	Upper cap jewels with end-pieces, for three wheels	INT.S 50
335ISO 70.851	Lower cap jewels with end-pieces, for two wheels	INT.S 50
342ISO 70.881	Bearing plate, jewelled, for sweep second wheel	INT.S 50
401ISO 51.010	Winding stem	INT.S 50
407ISO 31.121	Clutch wheel	INT.S 50
410ISO 31.120	Winding pinion	INT.S 50
415ISO 31.020	Ratchet wheel	INT.S 50
420ISO 31.023	Crown wheel	INT.S 50
422ISO 81.067	Crown wheel ring	INT.S 50
425ISO 51.120	Click	INT.S 50
430ISO 61.080	Click spring	INT.S 41 INT.S 46 INT.S 50 INT.S 52 INT.S 53 INT.S 55 INT.S 551 INT.S 552
435ISO 51.050	Yoke	INT.S 50
440ISO 61.100	Yoke spring	INT.S 50
443ISO 51.080	Setting lever	INT.S 50
443/5443ISO 51.080.06/.01	Setting lever	INT.S 50
445ISO 51.090	Setting lever spring	INT.S 50
450ISO 31.100	Setting wheel	INT.S 50
462ISO 10.062	Minute work cock	INT.S 50
705ISO 30.040	Escape wheel and pinion	INT.S 50

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 501 (height × diameter × thickness × length) and matching mainspring in our shop:

INT.S 501: 1.10 × 9.0 × 0.12 × 300 mm (GR 2651)

🔗 Movements sharing the most parts

→ All calibers of INT.S

❓ Frequently asked questions

Which INT.S 501 spare parts also fit other movements?

For the INT.S 501, 27 part numbers are listed as interchangeable. Together they fit 8 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the INT.S 501?

The most shared parts: INT.S 50 (27 parts), INT.S 41 (1 parts), INT.S 46 (1 parts).

Which mainspring fits the INT.S 501?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.10 × 9.0 × 0.12 × 300 mm (GR 2651, hand-wound, normal end hook).