Seiko Cal. 4521 - 256

The Seiko 4521-256 represents an important milestone in Seiko's 1987 lineup. Powered by the 4521 caliber with 17j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-f9da5e723605]

Also known as: Sea Horse

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

44mm

Case Thickness

14.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Navy

Jewels

17j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1987

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