Seiko Cal. 4540 - 577

This Spring Drive model from 1968 features a 39mm Stainless Steel case. Powered by the 4540 caliber with 17j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-3ccfa833844f]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Champagne

Jewels

17j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1968

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