Seiko Cal. 6647 - 321

The 6647-321 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6647 caliber with 33j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-44349811355c]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

34mm

Case Thickness

8.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Green

Jewels

33j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1978

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