Seiko Cal. 6331 - 313

Seiko 6331-313

The 6331-313 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6331 caliber with 35j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-b8fa9e8be275]

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
14.9mm
Lug Width
18mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
160m
Dial Color
Navy
Jewels
35j
Frequency
36,000 bph
Power Reserve
39 hours
Year
1970

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