Seiko Cal. 6645 - 987

The Seiko 6645-987 represents an important milestone in Seiko's 1981 lineup. Powered by the 6645 caliber with 35j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-eb3cc2d9ec29]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

44mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1981

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