Seiko Cal. 5677 - 131

The Seiko 5677-131 represents an important milestone in Seiko's 1969 lineup. Powered by the 5677 caliber with 28j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-e79902aca5a6]

Also known as: Monster, Bellmatic

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

44mm

Case Thickness

9.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

150m

Dial Color

Burgundy

Jewels

28j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1969

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