Seiko first ever calculator Ref. C153-5007

Rare JDM Digital Calculator Watch
A collectible early digital-era Seiko JDM wristwatch calculator, combining futuristic technology with distinctive 1980s design. The model features a sharp geometric case, an integrated miniature calculator keypad, and a completely original stainless steel bracelet.
The case back includes an integrated quick-change battery cover, reflecting Seiko’s innovative engineering approach of the era.
A true vintage technology icon and a rare find for digital watch collectors.

- Very good condition
- The first in the world Seiko's calculator watch
- Integrated calculator, working backlight
- 35 mm
- Original stainless steel bracelet
- Year 1977