Seiko Cal. 6638 - 348

This Quartz model from 1976 features a 35mm Hardlex-Coated Steel case. Powered by the 6638 caliber with 19j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-0777364152d7]

Also known as: Sportsmatic, Sea Horse

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1976

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