Seiko Cal. 4536 - 991

The Seiko 4536-991 represents an important milestone in Seiko's 1983 lineup. Powered by the 4536 caliber with 28j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-ad1f505b8ec1]

Also known as: Samurai

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Cream

Jewels

28j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1983

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