Seiko Cal. 6643 - 915

The Seiko 6643-915 represents an important milestone in Seiko's 1974 lineup. It features a Champagne dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-ee146f8f62d5]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Champagne

Jewels

28j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1974

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