Seiko Cal. 4591 - 765

The Seiko 4591-765 represents an important milestone in Seiko's 1987 lineup. With its 20mm lug width and 11.5mm profile, it sits comfortably on most wrists. [seikata-wm-f525a4da7bf0]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Navy

Jewels

35j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1987

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