Seiko Cal. 6643 - 382

The Seiko 6643-382 represents an important milestone in Seiko's 1970 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-5e20e84be8a6]

Also known as: Golden Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Burgundy

Jewels

35j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1970

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