Seiko Cal. 4521 - 816

The Seiko 4521-816 represents an important milestone in Seiko's 1982 lineup. Powered by the 4521 caliber with 32j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-d779e0793232]

Also known as: Golden Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

41mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1982

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