Seiko Cal. 6647 - 150

The 6647-150 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6647 caliber with 17j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-5d49958e48f5]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

46mm

Case Thickness

12.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1980

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