Seiko Cal. 4565 - 639

The Seiko 4565-639 represents an important milestone in Seiko's 1968 lineup. Powered by the 4565 caliber with 33j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-51890d429d82]

Also known as: Sumo, World Timer

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Silver

Jewels

33j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1968

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