Seiko Cal. 4578 - 373

The Seiko 4578-373 represents an important milestone in Seiko's 1986 lineup. Powered by the 4578 caliber with 20j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-e1c54fe1665c]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

8.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1986

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