Seiko Cal. 5641 - 804

The 5641-804 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5641 caliber with 36j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-0d8408223b36]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1971

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