Seiko Cal. 3840 - 142

This Hand-Winding model from 1977 features a 37mm Stainless Steel case. With its 20mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-57004276e40c]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

13.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1977

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