Seiko Cal. 0712 - 657

The 0712-657 is a sought-after Spring Drive piece from Seiko's golden era. It features a Green dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-7b45e5be5053]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

10.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1983

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