Seiko Cal. 6391 - 539

The Seiko 6391-539 represents an important milestone in Seiko's 1966 lineup. Powered by the 6391 caliber with 34j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-c5cfe5532d4d]

Also known as: Bullhead, Rally

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

8.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1966

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