Seiko Cal. 7131 - 305

Seiko 7131-305

This Spring Drive model from 1981 features a 40mm Hardlex-Coated Steel case. With its 18mm lug width and 12.4mm profile, it sits comfortably on most wrists. [seikata-wm-3d2082ce0f78]

Also known as: World Timer, Golden Tuna

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
12.4mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
200m
Dial Color
Navy
Jewels
34j
Frequency
21,600 bph
Power Reserve
44 hours
Year
1981

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