Seiko Cal. 7131 - 312

The 7131-312 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 7131 caliber with 23j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-c471539cf202]

Also known as: Sea Horse, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

14.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

White

Jewels

23j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1972

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