Seiko Cal. 6139 - 727

The Seiko 6139-727 represents an important milestone in Seiko's 1984 lineup. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-4a59709b4f8c]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Black

Jewels

32j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1984

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