Seiko Cal. 5645 - 270

The Seiko 5645-270 represents an important milestone in Seiko's 1973 lineup. Powered by the 5645 caliber with 25j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-26e82c2aee8d]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

15.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Burgundy

Jewels

25j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1973

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