ETA 2550R – interchangeable spare parts
ETA 2550R movement
Which spare parts fit the ETA 2550R movement? For every part you can see which other calibers use the same part according to the original interchangeability list.
🔧 Interchangeable parts
| Part no. | Description | Also fits |
|---|---|---|
| 161ISO 80.400 | Centre tube | |
| 182ISO 20.030 | Barrel and cover | |
| 195ISO 20.060 | Barrel arbor | |
| 203ISO 30.012 | Intermediate wheel | |
| 210ISO 30.025 | Third wheel | |
| 227ISO 30.027 | Second wheel | |
| 227/3ISO 30.027.18 | Second wheel, without sweep second | |
| 242ISO 31.083 | Cannon pinion with driving wheel | |
| 242/1ISO 31.083.18 | Cannon pinion with driver, without sweep second | |
| 255ISO 31.046 | Hour wheel | |
| 260ISO 31.041 | Minute wheel | |
| 307ISO 40.301 | Regulator without pointer, assembled | |
| 307/2ISO 40.302 | Regulator without pointer, assembled | |
| 311ISO 70.800 | Upper cap jewel with end-piece, f. balance | |
| 330ISO 70.801 | Lower cap jewel with end-piece, f. balance | |
| 401ISO 51.010 | Winding stem | |
| 407ISO 31.121 | Sliding pinion | |
| 410ISO 31.120 | Winding pinion | |
| 415ISO 31.020 | Ratchet wheel | |
| 420ISO 31.023 | Crown wheel | |
| 425ISO 51.120 | Click | |
| 430ISO 61.080 | Click spring | |
| 435ISO 51.050 | Yoke | |
| 440ISO 61.100 | Yoke spring | |
| 443ISO 51.080 | Setting lever | |
| 443/5443ISO 51.080.06/.01 | Setting lever | |
| 445ISO 51.090 | Setting lever jumper | |
| 450ISO 31.100 | Setting wheel | |
| 460ISO 51.055 | Crown wheel rocker | |
| 462ISO 10.062 | Minute train bridge | |
| 705ISO 30.040 | Escape wheel | |
| 710ISO 40.010 | Pallet fork | |
| 1143/1ISO 22.010.06 Roulement à billes | Oscillating weight, assembled | |
| 1481ISO 32.031 | Reduction wheel | |
| 1482ISO 32.033 | Ratchet wheel driving wheel | |
| 1488ISO 32.037 | Reversing wheel | |
| 1497ISO 22.040 | Ball bearing | |
| 1525ISO 52.122 | Bolt for reduction gear | |
| 1526ISO 52.125 | Bolt for pawl winding wheel | |
| 1530ISO 32.038 | Additional pawl winding wheel (without pinion) | |
| 51497ISO 22.040.01 | Screw for ball bearing |
Source: original interchangeability lists of ETA (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 ETA 2550R (height × diameter × thickness × length) and matching mainspring in our shop:
🔗 Movements sharing the most parts
❓ Frequently asked questions
Which ETA 2550R spare parts also fit other movements?
For the ETA 2550R, 41 part numbers are listed as interchangeable. Together they fit 38 other calibers – the table below shows which part fits which movement.
Which movements share the most parts with the ETA 2550R?
The most shared parts: ETA 2551R (59 parts), ETA 2550 (57 parts), ETA 2551 (56 parts).
Which mainspring fits the ETA 2550R?
According to the Générale Ressorts catalogue (height × diameter × thickness × length): 1.30 × 7.0 × 0.075 × 240 mm (GR 3194-X, automatic, with welded slipping bridle).
🛠️ For the workshop
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