Seiko Cal. 6646 - 840

The Seiko 6646-840 represents an important milestone in Seiko's 1965 lineup. The Inner Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-4d46354192ba]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1965

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