Seiko Cal. 4539 - 284

This Hand-Winding model from 1970 features a 36mm Stainless Steel case. Powered by the 4539 caliber with 27j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-4625172d14d4]

Also known as: Goldfeather, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

13.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Silver

Jewels

27j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1970

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