Seiko Cal. 4428 - 397

The 4428-397 is a sought-after Automatic piece from Seiko's golden era. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-ca20dcb9a0e9]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

110m

Dial Color

Silver

Jewels

26j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1979

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