Seiko Cal. 5664 - 939

The Seiko 5664-939 represents an important milestone in Seiko's 1967 lineup. Powered by the 5664 caliber with 21j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-1a2d650b53f1]

Also known as: Bellmatic, World Timer

Specifications

Movement

Solar

Case Material

Titanium

Case Width

38mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1967

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