Seiko Cal. 6635 - 664

Seiko 6635-664

This Quartz model from 1975 features a 40mm PVD Black case. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-072dfa504844]

Also known as: Tuna, Helmet

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
40mm
Case Thickness
15.3mm
Lug Width
21mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
60m
Dial Color
Cream
Jewels
35j
Frequency
36,000 bph
Power Reserve
51 hours
Year
1975

Related Models

seikata-wm-072dfa504844