Seiko Cal. 6645 - 557

The 6645-557 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6645 caliber with 33j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-d70b4563a1ec]

Also known as: Samurai, Crown

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

33j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1970

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