Seiko Cal. 6643 - 152

The Seiko 6643-152 represents an important milestone in Seiko's 1973 lineup. It features a Cream dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-75b53b7a949f]

Also known as: Silverwave, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Cream

Jewels

24j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1973

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