| Manufacturer | Seiko Time Corp. |
| Caliber Number | 11A |
| Base Caliber | Seiko 1104A |
| Movement Type | Mechanical, manual-wind |
| Diameter | 15.15mm x 13mm |
| Height | 3.5mm |
| Jewel Count | 17 or 21 |
| Beat Rate | 21,600 vph |
| Lift Angle | Unconfirmed |
| Power Reserve | Unconfirmed |
| Anti-Shock Device | Diashock |
| Hand Count | 2 |
| Functions | Central hours; central minutes |
| Country of Manufacture | Made in Japan or Singapore |
| Known Models | Vintage ladies Seiko watches (Add your watch to the comments below…) |
The Seiko caliber 11A is a basic mechanical 2-hander lady’s small size watch movement.
Not to be confused with the Seiko 11A Indicator men’s wristwatches.
Variations of 11A:
The 11A can be found with 17 jewels or 21 jewels, as well as made in Japan or made in Singapore.
Seiko 11A VS 1104A:
There is a similar caliber 1104A which the 11A is based on. The main difference is that the 1104A has a central seconds hand.
Additional Resources:
Submitted by member Rodders
network of watch sites
Recent Comments
Hi Omega caliber 571 and 570 escape wheel is same or different
Yep, 763e. That has to be it. Thanks for your confirmation. Many thanks
https://calibercorner.com/ronda-caliber-763e/
Ah, I believe it's a 763e Am I correct?
Glad you found it! https://calibercorner.com/ronda-caliber-763/
Without taking mine apart, I found the same exact watch with the Ronda movement. Face…
Hi Keith, please try posting a picture of the movement and watch in the forum.