Seiko Cal. 4427 - 707

This Spring Drive model from 1965 features a 44mm PVD Black case. The Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-9e050f5140a2]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1965

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