Seiko Cal. 4591 - 403

This Spring Drive model from 1987 features a 45mm Two-Tone case. Powered by the 4591 caliber with 36j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-d58d8162c024]

Also known as: Bullhead, World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

Black

Jewels

36j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1987

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