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
Recent Comments
Militado got this movement
Henry Archer Vesterhav. Mine is running at +2 sec/day. I do wish that the movement…
Step 1) Set the time correctly. Step 2) Wait 24 hours. Step 3) Compare the…
The wonderfully underrated Festina Automatic Skeleton (20632/1) also uses this movement. It keeps time better…
17 is the grout number. ST1701 is the specific automatic calibre and ST1700 the manual…
Duzu Watches of Western Australia use this movement in their DW-D3 diver range