Seiko Cal. 6646 - 739

The 6646-739 is a sought-after Solar piece from Seiko's golden era. Powered by the 6646 caliber with 17j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-a1bebbd62bc8]

Also known as: World Timer

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1976

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