Seiko Cal. 7131 - 677

Seiko 7131-677

The 7131-677 is a sought-after Automatic piece from Seiko's golden era. It features a Silver dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-5bcef7bc4bf5]

Also known as: Tuna, Sea Horse

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
15.9mm
Lug Width
22mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
50m
Dial Color
Silver
Jewels
35j
Frequency
21,600 bph
Power Reserve
57 hours
Year
1968

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