Seiko Cal. 6646 - 443

The Seiko 6646-443 represents an important milestone in Seiko's 1978 lineup. It features a Cream dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-5a16e1232015]

Also known as: Baby Tuna, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

30m

Dial Color

Cream

Jewels

22j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1978

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