Seiko Cal. 4427 - 538

This Spring Drive model from 1982 features a 36mm PVD Black case. Powered by the 4427 caliber with 25j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-e5fca5eda629]

Also known as: Tuna, Panda

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

13.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

White

Jewels

25j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1982

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