Seiko Cal. 6647 - 427

The Seiko 6647-427 represents an important milestone in Seiko's 1984 lineup. Powered by the 6647 caliber with 22j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-51c668ccdd01]

Also known as: Bullhead, UFO

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

Silver

Jewels

22j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1984

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