Seiko Cal. 6393 - 703

This Quartz model from 1967 features a 37mm Hardlex-Coated Steel case. Powered by the 6393 caliber with 33j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-1fa9c638727e]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Cream

Jewels

33j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1967

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