Seiko Cal. 6643 - 172

The Seiko 6643-172 represents an important milestone in Seiko's 1967 lineup. It features a Cream dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-71e56439f06b]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

12.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Cream

Jewels

24j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1967

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