Technical information (Japan)
Technical information (World)
Watches with the 2220 movement
| 2220-0180 |
| 2220-0300 |
| 2220-0310 |
| 2220-0520 |
| 2220-0530 |
| 2220-3170 |
| 2220-3230 |
| 2220-3240 |
| 2220-3440 |
| 2220-3460 |
| 2220-5000 |
| 2220-7070 |
Seiko News – October 1971
Seiko Dress Watch 2220
The Caliber 2559, used in men’s dress watches and high-end women’s watches, is now being replaced by Caliber 2220, while maintaining its slim profile and stable accuracy.
This new caliber features a simple hand-wound two-hand mechanism, an 8-beat high-frequency movement, and a fine adjustment system—a high-level mechanical design. It will continue to be used primarily in dress watches and fashion watches, expanding the variety of models suited for stylish young people.
From pair watches for young couples, to rectangular dress watches for dandy gentlemen, and a rich variety of high-sense town watches for women—please recommend these widely to your fashion-conscious young customers.
Product Specifications
● Product Name: Seiko 2220
● Caliber No.: 2220A
● Abbreviation / Jewels: 2220 – 24 jewels
● Movement Dimensions:
Movement diameter: 17.20 mm
Thickness: 3.20 mm
● Frequency: 28,800 vibrations/hour (8 beats/sec)
● Jewels Distribution:
1st wheel upper & lower hole jewels – 2
2nd wheel upper & lower hole jewels – 2
3rd wheel upper & lower hole jewel bearings – 4
4th wheel upper & lower hole jewel bearings – 3
Escape wheel upper & lower hole jewel bearings – 4
Pallet upper & lower hole jewels – 2
Pallet stones (impulse jewels) – 3
Balance upper & lower hole jewel bearings – 4
Total: 24 jewels
● Additional Mechanism: Fine adjustment device
Seiko News – May 1972
Seiko News – May 1973
