Seiko Cal. 6644 - 837

This Quartz model from 1978 features a 43mm Two-Tone case. Powered by the 6644 caliber with 36j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-0be4580bbbfc]

Also known as: Navigator, Emperor

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

43mm

Case Thickness

11.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

White

Jewels

36j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1978

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