Seiko Cal. 6647 - 287

The Seiko 6647-287 represents an important milestone in Seiko's 1965 lineup. Powered by the 6647 caliber with 31j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-ace55ccf76fe]

Also known as: Samurai, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1965

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