Seiko Cal. 0770 - 641

The Seiko 0770-641 represents an important milestone in Seiko's 1980 lineup. Powered by the 0770 caliber with 23j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-bf7faee928fd]

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

10.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1980

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