Seiko Cal. 4512 - 840

The Seiko 4512-840 represents an important milestone in Seiko's 1978 lineup. Powered by the 4512 caliber with 24j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-92aebe2846bf]

Also known as: Sumo, Flighty

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

24j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1978

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