Seiko Cal. 7031 - 827

Seiko 7031-827

This Spring Drive model from 1975 features a 43mm Titanium case. With its 20mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-6db6f1b481d8]

Also known as: Tuna, Bullhead

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
43mm
Case Thickness
13.8mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
50m
Dial Color
Green
Jewels
23j
Frequency
28,800 bph
Power Reserve
52 hours
Year
1975

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