Seiko Cal. 6391 - 668

This Hand-Winding model from 1971 features a 36mm PVD Black case. Powered by the 6391 caliber with 30j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-c1eaa0fc9440]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1971

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