Seiko Cal. 6631 - 787

Seiko 6631-787

This Hand-Winding model from 1982 features a 35mm Titanium case. The Coin-Edge bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-64592ed757d0]

Also known as: Tuna

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
35mm
Case Thickness
13.3mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
160m
Dial Color
Blue Sunburst
Jewels
34j
Frequency
28,800 bph
Power Reserve
41 hours
Year
1982

Related Models

seikata-wm-64592ed757d0