Seiko Cal. 0788 - 142

This Spring Drive model from 1969 features a 40mm Two-Tone case. With its 21mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-0a11c17f9278]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

8.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Black

Jewels

23j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1969

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