Seiko Cal. 4427 - 715

The Seiko 4427-715 represents an important milestone in Seiko's 1976 lineup. Powered by the 4427 caliber with 24j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-7a2724197d00]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

12.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Cream

Jewels

24j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1976

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