Seiko Cal. 6638 - 990

Seiko 6638-990

This Hand-Winding model from 1971 features a 46mm Two-Tone case. The Coin-Edge bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-96160740ee10]

Also known as: World Timer

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
46mm
Case Thickness
11.4mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
110m
Dial Color
Blue Sunburst
Jewels
24j
Frequency
36,000 bph
Power Reserve
67 hours
Year
1971

Related Models

seikata-wm-96160740ee10