Seiko Cal. 6647 - 745

Released in 1993, the Cal. 6647 with design code 745 was part of Seiko's domestic market collection. Powered by the 6647 caliber with 25j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-9efb6aa15176]

Also known as: Helmet, UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1993

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