Seiko Cal. 5239 - 900

The Seiko 5239-900 represents an important milestone in Seiko's 1989 lineup. Powered by the 5239 caliber with 18j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-9dc2e3ebd273]

Also known as: Sumo, Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1989

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