Seiko Cal. 6643 - 464

This Automatic model from 1968 features a 36mm PVD Black case. Powered by the 6643 caliber with 33j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-eb785a1d0f82]

Also known as: World Timer, Navigator

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

36mm

Case Thickness

14.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

33j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1968

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