Seiko Cal. 6391 - 544

This Automatic model from 1967 features a 40mm PVD Black case. Powered by the 6391 caliber with 22j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-6a515176acab]

Also known as: Monster, Flighty

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Champagne

Jewels

22j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1967

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