Seiko Cal. 4537 - 661

The Seiko 4537-661 represents an important milestone in Seiko's 1988 lineup. The Coin-Edge bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-688be2ecc202]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Black

Jewels

18j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1988

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