Seiko Cal. 4421 - 336

The Seiko 4421-336 represents an important milestone in Seiko's 1975 lineup. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-bc5c4f835274]

Also known as: Baby Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

42mm

Case Thickness

8.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Black

Jewels

23j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1975

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