Seiko Cal. 6646 - 664

The Seiko 6646-664 represents an important milestone in Seiko's 1977 lineup. Powered by the 6646 caliber with 23j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-bb98ecd9cb99]

Also known as: Panda, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

43mm

Case Thickness

9.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Silver

Jewels

23j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1977

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