Seiko Cal. 7177 - 646

The Seiko 7177-646 represents an important milestone in Seiko's 1978 lineup. Powered by the 7177 caliber with 36j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-3c84329829b1]

Also known as: Monster, Navigator

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Cream

Jewels

36j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1978

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