Seiko Cal. 7091 - 397

The 7091-397 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 7091 caliber with 34j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-90aaabc6cd2a]

Also known as: Sumo, Flighty

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

45mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

100m

Dial Color

Burgundy

Jewels

34j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1976

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