Seiko Cal. 7177 - 739

This Spring Drive model from 1965 features a 46mm Hardlex-Coated Steel case. Powered by the 7177 caliber with 31j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-130483118ece]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

14.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Burgundy

Jewels

31j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1965

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