Seiko Cal. 6645 - 674

The 6645-674 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6645 caliber with 24j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-76da2ed5be66]

Also known as: Samurai, Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

24j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1975

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