Seiko Cal. 0739 - 640

The Seiko 0739-640 represents an important milestone in Seiko's 1981 lineup. Powered by the 0739 caliber with 36j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-a866ad6a8d3d]

Also known as: Silverwave, Arnie

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

43mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1981

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