ETA 556.121 – interchangeable spare parts

ETA 556.121 movement

Which spare parts fit the ETA 556.121 movement? For every part you can see which other calibers use the same part according to the original interchangeability list.

41Parts with interchange data
121Calibers sharing parts
Note: We have compiled this overview to the best of our knowledge and belief, based on the original interchangeability lists of ETA 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.DescriptionAlso fits
110ISO 10.048Train wheel bridge, jewelled
144ISO 10.300Dial fastener
145ISO 10.106Dial support
161ISO 80.400Centre tube
203ISO 30.012Intermediate wheel
210ISO 30.025Third wheel
227ISO 30.027Second wheel
242ISO 31.083Cannon pinion with driving wheel
255/1ISO 31.046.06Hour wheel, assembled
260ISO 31.041Minute wheel
405/3ISO 51.020Handsetting stem
407/1ISO 31.121.06Sliding pinion
435/3ISO 51.050.06Yoke
443/1ISO 51.080.06Setting lever, assembled
445/2ISO 51.091Combined setting lever jumper
450/1ISO 31.100.06Setting wheel, assembled
462/1ISO 10.062.06Minute train bridge
549ISO 81.185Setting lever spring-clip
560ISO 56.071Stop lever and switch
2539ISO 53.022Date corrector operating lever
2543ISO 33.011Intermediate date wheel
2555ISO 33.028Calendar driving wheel
2557/1ISO 91.440Date indicator
2561/1ISO 91.441Day indicator
2567ISO 53.201Day corrector
2569ISO 53.204Double corrector
2570ISO 53.026Double corrector operating lever
2573ISO 63.032Day jumper spring
2576ISO 53.080Date jumper
2577ISO 53.081Day jumper
2595/1ISO 13.111.06Date jumper maintaining plate
2780ISO 83.171Day indicator spring-clip
4000ISO 10.513Electronic module
4021ISO 20.582Stator
4022ISO 80.102Distance piece
4038ISO 20.584Electronic module cover
4046ISO 20.651Battery insulator
4211ISO 20.580Rotor
4402ISO 20.763Bridle
4412ISO 10.601Battery limiting spring
4929/1ISO 20.570.18Battery

Source: original interchangeability lists of ETA (checked transcription) and checked original spare-part labels · as of 2026-10-18. Height / execution: the part fits only in this height or execution.

🔗 Movements sharing the most parts

→ All calibers of ETA

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