Seiko Cal. 0789 - 437

The Seiko 0789-437 represents an important milestone in Seiko's 1978 lineup. With its 21mm lug width and 14.1mm profile, it sits comfortably on most wrists. [seikata-wm-cfdd254bd29d]

Also known as: Sumo, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

70m

Dial Color

Silver

Jewels

35j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1978

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