Seiko Cal. 4423 - 489

The Seiko 4423-489 represents an important milestone in Seiko's 1975 lineup. Powered by the 4423 caliber with 32j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-438276a770f1]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Cream

Jewels

32j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1975

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