Seiko Cal. 7131 - 837

Seiko 7131-837

The 7131-837 is a sought-after Spring Drive piece from Seiko's golden era. The Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-0dacc746eef4]

Also known as: Golden Tuna

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
12.9mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
190m
Dial Color
Black
Jewels
32j
Frequency
21,600 bph
Power Reserve
58 hours
Year
1987

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