Seiko Cal. 6647 - 307

The 6647-307 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6647 caliber with 18j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-eeea942ce336]

Also known as: Monster, Shogun

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

12.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1980

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