Seiko Cal. 6647 - 789

Released in 1991, the Cal. 6647 with design code 789 was part of Seiko's domestic market collection. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-ca3fea66fce0]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Burgundy

Jewels

31j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1991

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