Seiko Cal. 6647 - 166

The Seiko 6647-166 represents an important milestone in Seiko's 1967 lineup. Powered by the 6647 caliber with 19j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-c873a81cee07]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Silver

Jewels

19j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1967

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