Seiko Cal. 4537 - 720

The Seiko 4537-720 represents an important milestone in Seiko's 1989 lineup. Powered by the 4537 caliber with 20j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-cd5b4d580366]

Also known as: Rally, Arnie

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

9.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

White

Jewels

20j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1989

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