Seiko Cal. 4547 - 820

The Seiko 4547-820 represents an important milestone in Seiko's 1972 lineup. Powered by the 4547 caliber with 18j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-d089da905aca]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

80m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1972

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