Seiko Cal. 7040 - 378

This Hand-Winding model from 1969 features a 40mm Stainless Steel case. With its 21mm lug width and 13.5mm profile, it sits comfortably on most wrists. [seikata-wm-f8e58727f2f7]

Also known as: Sumo, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Black

Jewels

34j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1969

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