Seiko Cal. 4542 - 636

The Seiko 4542-636 represents an important milestone in Seiko's 1970 lineup. Powered by the 4542 caliber with 20j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-d2fa7556c58b]

Also known as: Monster, Sumo

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

60m

Dial Color

Black

Jewels

20j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1970

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