Seiko VK63 (SII) caliber vs Sellita SW100-1 caliber: specs compared
Updated 05 September 2026.
11
specs differ
Seiko VK63 (SII) caliber and Sellita SW100-1 caliber differ on 11 specs: maker, size, casing diameter, movement height, frequency, jewels.
| Spec | Seiko VK63 (SII) caliber | Sellita SW100-1 caliber |
|---|---|---|
| Maker | Seiko Instruments / SII | Sellita |
| Size | 13 1/2 ligne | 8 3/4 ligne |
| Casing diameter | 30.80 mm | 20.00 mm |
| Movement height | 5.10 mm | 3.35 mm |
| Frequency | 32,768 Hz quartz | 28,800 A/h (4 Hz) |
| Jewels | 0 | 25 |
| Winding | quartz, battery 394 (SR936SW) | automatic, bidirectional |
| Calendar / layout | meca-quartz chronograph, three sub-dials, date | centre seconds, date at 3 |
| Hand fitting | chronograph, sub-dial and centre hands | small-caliber hour / minute / second bores |
| Stem | VK-series stem | SW100 stem |
| Power reserve | battery, up to 3 years | approx. 40 h |
Questions and answers
How do Seiko VK63 (SII) caliber and Sellita SW100-1 caliber compare?
Seiko VK63 (SII) caliber and Sellita SW100-1 caliber differ on 11 specs: maker, size, casing diameter, movement height, frequency, jewels.