Seiko Cal. 6639 - 837

This Quartz model from 1968 features a 39mm Hardlex-Coated Steel case. Powered by the 6639 caliber with 33j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-233b53c824df]

Also known as: Turtle, Crown

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

White

Jewels

33j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1968

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