Seiko Cal. 4537 - 781

The 4537-781 is a sought-after Automatic piece from Seiko's golden era. The Bidirectional bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-f66bb9ab4355]

Also known as: Bullhead, Arnie

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

15.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Cream

Jewels

17j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1977

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