Seiko Cal. 5645 - 891

The 5645-891 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5645 caliber with 35j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-6077ffba61d3]

Also known as: Navigator, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Cream

Jewels

35j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1974

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