Seiko Cal. 6639 - 760

Seiko 6639-760

This Quartz model from 1981 features a 40mm PVD Black case. With its 22mm lug width and 12.3mm profile, it sits comfortably on most wrists. [seikata-wm-0d71b3d9985f]

Also known as: Monster, Golden Tuna

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
40mm
Case Thickness
12.3mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
100m
Dial Color
Cream
Jewels
23j
Frequency
21,600 bph
Power Reserve
42 hours
Year
1981

Related Models

seikata-wm-0d71b3d9985f