Seiko Cal. 6643 - 925

This Automatic model from 1970 features a 37mm Two-Tone case. Powered by the 6643 caliber with 23j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-be75d302b8b9]

Also known as: Sportsmatic, Crown

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Cream

Jewels

23j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1970

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