Seiko Cal. 4540 - 924

The Seiko 4540-924 represents an important milestone in Seiko's 1965 lineup. Powered by the 4540 caliber with 18j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-493f7747f4a2]

Also known as: Monster, Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1965

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