Seiko Cal. 4510 - 991

The Seiko 4510-991 represents an important milestone in Seiko's 1991 lineup. Powered by the 4510 caliber with 19j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-061b0ba367a2]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

19j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1991

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