Seiko Cal. 6645 - 648

Released in 1972, the Cal. 6645 with design code 648 was part of Seiko's domestic market collection. Powered by the 6645 caliber with 19j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-45b7af33a932]

Also known as: Sea Horse

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Black

Jewels

19j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1972

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