Seiko Cal. 4439 - 788

The Seiko 4439-788 represents an important milestone in Seiko's 1972 lineup. Powered by the 4439 caliber with 20j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-da125f9a7b5e]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1972

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