Seiko Cal. 6647 - 396

The Seiko 6647-396 represents an important milestone in Seiko's 1969 lineup. Powered by the 6647 caliber with 33j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-42d1607e23ee]

Also known as: Tuna, UFO

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1969

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