Seiko Cal. 4540 - 279

This Spring Drive model from 1981 features a 39mm Hardlex-Coated Steel case. Powered by the 4540 caliber with 24j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-863ca5d7adf4]

Also known as: Turtle, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Black

Jewels

24j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1981

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