ST 1940 – interchangeable spare parts

ST 1940 movement

Which spare parts fit the ST 1940 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

30Parts with interchange data
14Calibers sharing parts
Note: We have compiled this overview to the best of our knowledge and belief, based on the original interchangeability lists of ST 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.

🛒 Spare parts for ST 1940 in our shop

Regulator and Escape Wheel for ST 1940, ST 1941, ST 1950, ST 1951Regulator and Escape Wheel for ST 1940, ST 1941, ST 1950, ST 195113,90 € – 15,90 € incl. VAT *View item ›

🔧 Interchangeable parts

Part no.DescriptionAlso fits
163/1ISO 80.400Center pipe
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
182ISO 20.030Barrel and cover
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
195ISO 20.060Barrel arbor
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
201/1ISO 30.014Large driving wheel
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
210ISO 30.025Third wheel
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
227ISO 30.027Sweep second wheel
ST 1941ST 1950ST 1951
Height 608
ST 1941ST 1950ST 1951
240ISO 31.080Cannon-pinion
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
243ISO 31.081Cannon pinion without clam notch
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
Height 250
AS 1710ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
Height 275
AS 1710ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
255ISO 31.046Hour wheel
ST 1800ST 1802ST 1950
Height 151
AS 1710ST 1800ST 1802ST 1950
Height 176
AS 1710ST 1800ST 1802ST 1950
260ISO 31.041Minute wheel
AS 2060ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
307ISO 40.301Regulator with adjustable stud holder, for flat hairspring
ST 1941ST 1950ST 1951
311ISO 70.800Upper cap jewel with end-piece
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
330ISO 70.801Lower cap jewel with end-piece
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
401ISO 51.010Winding stem
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
407ISO 31.121Clutch wheel
ST 1051ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950
according to original label
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
410ISO 31.120Winding pinion
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
415ISO 31.020Ratchet wheel
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
420ISO 31.023Crown wheel
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
422ISO 81.067Crown wheel ring
AS 964ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
425ISO 51.120Click
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
430ISO 61.080Click spring
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
435ISO 51.050Yoke
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
440ISO 61.100Yoke spring
AS 984ST 1686ST 1786ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
443ISO 51.080Setting lever
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
443/5443ISO 51.080.06/.01Setting lever
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
445ISO 51.090Setting lever spring
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
450ISO 31.100Setting wheel
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
468ISO 51.202Cannon pinion guard
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951
705ISO 30.040Escape wheel and pinion
ST 1941ST 1950ST 1951
710ISO 40.010Jewelled pallet fork and stat
ST 1800ST 1801ST 1802ST 1803ST 1941ST 1950ST 1951

Source: original interchangeability lists of ST (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 ST 1940 (height × diameter × thickness × length) and matching mainspring in our shop:

🔗 Movements sharing the most parts

→ All calibers of ST

❓ Frequently asked questions

Which ST 1940 spare parts also fit other movements?

For the ST 1940, 30 part numbers are listed as interchangeable. Together they fit 14 other calibers – the table below shows which part fits which movement.

Which movements share the most parts with the ST 1940?

The most shared parts: ST 1950 (36 parts), ST 1941 (33 parts), ST 1800 (32 parts).

Which mainspring fits the ST 1940?

According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.70 × 9.0 × 0.10 × 300 mm (GR 4879, hand-wound, normal end hook).

Can I buy spare parts for the ST 1940?

Yes, Master Watch Parts currently has 1 matching items in stock.

🛠️ For the workshop

SAPPHIRE CRYSTAL WATCH GLASS REPLACEMENT ROUND 2.0 MM THICK FLAT SIZE 20MM-42.5MMSAPPHIRE CRYSTAL WATCH GLASS REPLACEMENT ROUND 2.0 MM THICK FLAT SIZE 20MM-42.5MM27,90 € – 39,90 € incl. VAT *View item ›Sternkreuz ATHG Watch Crystal, High Domed, Reinforced, Gold-Plated Ring – WristwatchSternkreuz ATHG Watch Crystal, High Domed, Reinforced, Gold-Plated Ring – Wristwatch9,95 € – 11,95 € incl. VAT *View item ›Extra Long Brass Clock Winding Key for Table, Floor and Wall ClocksExtra Long Brass Clock Winding Key for Table, Floor and Wall Clocks7,90 € – 9,90 € incl. VAT *View item ›
WordPress Cookie Notice by Real Cookie Banner