Seiko Cal. 0724 - 639

The Seiko 0724-639 represents an important milestone in Seiko's 1984 lineup. Powered by the 0724 caliber with 19j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-b0e817137bd6]

Also known as: Bullhead, Navigator

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1984

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