Seiko Cal. 7138 - 790

This Hand-Winding model from 1972 features a 34mm Stainless Steel case. It features a Navy dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-3ad478cbfdd7]

Also known as: Sumo, Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

27j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1972

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