Seiko Cal. 6646 - 713

Released in 1987, the Cal. 6646 with design code 713 was part of Seiko's domestic market collection. Powered by the 6646 caliber with 22j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-1b6fdf5658ea]

Also known as: Tuna, Emperor

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Burgundy

Jewels

22j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1987

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