| Manufacturer | ETA |
| Caliber Number | 2850 |
| Movement Type | Mechanical, manual-wind |
| Lignes | 11.5”’ |
| Diameter | 25.6mm |
| Height | 4.3mm |
| Jewel Count | Varies |
| Beat Rate | 28,800 vph, 4 Hz |
| Lift Angle | 52 degrees |
| Power Reserve | ~38 hours |
| Hand-Windable? | Yes |
| Anti-Shock Device | Incabloc |
| Hand Count | 3 |
| Functions | Central hours; central minutes; central sweeping seconds |
| Hacking Seconds? | Yes |
| Country of Manufacture | Switzerland, Swiss made |
| Known Models | (Add your watch to the comments below…) |
The ETA caliber 2850 is a vintage time-only manual-wind mechanical movement. It is a true no-date movement.
This caliber is an early member of the ETA 28XX family of movements.
Documentation for this caliber was found as far back as 1976.
Additional Resources:
This caliber listing is still in need of quality images. If you have images (taken by you), please donate them to complete this post…
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Recent Comments
Thank for for taking the time to point out the error in the jewel count!…
Your comment wasn't deleted lol. It was in spam for some reason. Thanks for sharing…
The Indian watch company HMT is making something they call the Nuovo with this movement.
Hi, What movement could be used as a replacement for this discontinued model? Regards David
Movement also used in Rotary Chronograph GB03633/04
The L687.5 has 27 Jewels not "25". Source (go ahead and delete my comment again.…
I have recently purchased a Longines with a 687.5 movement. "27 Jewels" is engraved into…