Seiko Cal. 6390 - 709

This Automatic model from 1968 features a 39mm Hardlex-Coated Steel case. Powered by the 6390 caliber with 30j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-ec604366e81d]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

12.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Green

Jewels

30j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1968

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