Seiko Cal. 4521 - 819

The Seiko 4521-819 represents an important milestone in Seiko's 1980 lineup. The Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-59fc8917c32b]

Also known as: Sumo, Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Black

Jewels

29j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1980

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