Seiko Cal. 6645 - 891

The 6645-891 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6645 caliber with 36j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-22bc79fe566a]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1972

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