Seiko VK63 (SII) caliber vs Seiko VK64 (SII) caliber: specs compared
Updated 05 September 2026.
1
specs differ
Seiko VK63 (SII) caliber and Seiko VK64 (SII) caliber differ on 1 spec: calendar / layout.
| Spec | Seiko VK63 (SII) caliber | Seiko VK64 (SII) caliber |
|---|---|---|
| Maker | Seiko Instruments / SII | Seiko Instruments / SII |
| Size | 13 1/2 ligne | 13 1/2 ligne |
| Casing diameter | 30.80 mm | 30.80 mm |
| Movement height | 5.10 mm | 5.10 mm |
| Frequency | 32,768 Hz quartz | 32,768 Hz quartz |
| Jewels | 0 | 0 |
| Winding | quartz, battery 394 (SR936SW) | quartz, battery 394 (SR936SW) |
| Calendar / layout | meca-quartz chronograph, three sub-dials, date | meca-quartz bicompax chronograph, two sub-dials, date |
| Hand fitting | chronograph, sub-dial and centre hands | chronograph, sub-dial and centre hands |
| Stem | VK-series stem | VK-series stem |
| Power reserve | battery, up to 3 years | battery, up to 3 years |
Questions and answers
How do Seiko VK63 (SII) caliber and Seiko VK64 (SII) caliber compare?
Seiko VK63 (SII) caliber and Seiko VK64 (SII) caliber differ on 1 spec: calendar / layout.