Seiko Cal. 4515 - 742

This Spring Drive model from 1984 features a 46mm PVD Black case. Powered by the 4515 caliber with 21j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-3bbb0209a2f4]

Also known as: UFO, Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Black

Jewels

21j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1984

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