Seiko Cal. 0731 - 371

Seiko 0731-371

The Seiko 0731-371 represents an important milestone in Seiko's 1977 lineup. Powered by the 0731 caliber with 25j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-3adac713c3dc]

Also known as: Monster, Tuna

Specifications

Movement
Solar
Case Material
Titanium
Case Width
38mm
Case Thickness
14.2mm
Lug Width
22mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
130m
Dial Color
Green
Jewels
25j
Frequency
21,600 bph
Power Reserve
46 hours
Year
1977

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seikata-wm-3adac713c3dc