Seiko Cal. 4521 - 740

The Seiko 4521-740 represents an important milestone in Seiko's 1986 lineup. It features a White dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-778cb96dd6f3]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

White

Jewels

31j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1986

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