Seiko Cal. 7031 - 535

The 7031-535 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 7031 caliber with 33j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-73e05d9da2ae]

Also known as: Sea Horse, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Navy

Jewels

33j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1971

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