Seiko Cal. 6154 - 637

The Seiko 6154-637 represents an important milestone in Seiko's 1991 lineup. Powered by the 6154 caliber with 28j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-0ead61ce5717]

Also known as: Bullhead, Navigator

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

34mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Cream

Jewels

28j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1991

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