Seiko Cal. 0739 - 561

The Seiko 0739-561 represents an important milestone in Seiko's 1966 lineup. Powered by the 0739 caliber with 32j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-49a1849f1f6e]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Green

Jewels

32j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1966

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