Seiko Cal. 4542 - 765

The Seiko 4542-765 represents an important milestone in Seiko's 1977 lineup. Powered by the 4542 caliber with 21j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-94ce548e1997]

Also known as: Sumo, Bellmatic

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Burgundy

Jewels

21j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1977

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