Manufacturer | ETA |
Caliber Number | 256.041 |
Lignes | 8 1/4”’ |
Diameter |
18.2mm |
Height |
1.95mm thick |
Battery Cell Number | 315 |
Jewels |
6 |
Frequency |
32,768 Hz |
Stem | 401-1099 |
Hand Sizes | 120/70 (tap 10) |
Functions | Central hours, central minutes, date |
Country of Manufacture | Switzerland |
Known Models |
Rado Diastar (Add your watch to the comments below…) |
ETA caliber 256.041 is a 2 hand Swiss made quartz movement with 6 jewels. Official documentation for this movement was found with dates from 2009. This caliber 256.041 is currently discontinued by ETA. The replacement is caliber E61.041. You may also be able to use ETA caliber 256.031, but this should be confirmed first. If you just need the electric module, the part number is 4000.
5 or 6 Jewels, Date or No Date:
Official ETA tech sheets list this caliber as having 6 jewels with a calendar (date) complication, however, we have come across movements signed with the same caliber number, but having 5 jewels (for example: the picture posted by Fabio in the comments below). This could be an older version of the movement, but it could also have something to do with date/no date. The 5 jewel versions found were hours and minutes only and without a date. Please comment below if you have a 5 or 6 jewels movements and whether your watch has a date or not.
Similar Calibers:
This movement may also be related to the following:
- Longines caliber 150.2
- Concord caliber 46
- Movado caliber 46
Macro Gallery:
Additional Resources:
Recent Comments
Used by the Orion Hellcat
There is no regulator on the escapement, regulation is achieved using a laser adjustment system…
Thank you.
The 01 number varies according to the position of the complication. For example ST3600 is…
Hi Thomas, the same manual also states: "Automatic selection of time signal stations (JJY only)"…
MANUAL SAYS RECEIVES ALL SIGNALS, NOT JUST JAPAN.
B04 is also used in the new Breitling Super AVI collection. Very impressive movement