Seiko Cal. 5645 - 692

The 5645-692 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5645 caliber with 28j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-a900e69d86ed]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

15.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1976

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