Seiko Cal. 6138 - 631

Seiko 6138-631

This Spring Drive model from 1977 features a 43mm Hardlex-Coated Steel case. With its 21mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-b33b6f3a80f1]

Also known as: Turtle, Flighty

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
9.5mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
140m
Dial Color
Silver
Jewels
29j
Frequency
21,600 bph
Power Reserve
61 hours
Year
1977

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