Seiko Cal. 4427 - 643

The Seiko 4427-643 represents an important milestone in Seiko's 1988 lineup. Powered by the 4427 caliber with 17j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-48f7158fdd3f]

Also known as: Panda

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Green

Jewels

17j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1988

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