Seiko Cal. 4591 - 366

Released in 1988, the Cal. 4591 with design code 366 was part of Seiko's domestic market collection. The Coin-Edge bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-e0335af7cfed]

Also known as: Helmet, Bellmatic

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1988

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