Seiko Cal. 6363 - 731

This Automatic model from 1969 features a 34mm PVD Black case. Powered by the 6363 caliber with 22j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-bbab19d418cd]

Also known as: Tuna, Arnie

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

34mm

Case Thickness

14.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1969

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