Seiko Cal. 4521 - 381

The Seiko 4521-381 represents an important milestone in Seiko's 1977 lineup. The Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-8eeac9a6a2e8]

Also known as: Crown, Emperor

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

15.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Silver

Jewels

18j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1977

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