Seiko Cal. 7188 - 657

The 7188-657 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7188 caliber with 22j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-33d9c31ecd02]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Burgundy

Jewels

22j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1979

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