Seiko Cal. 6643 - 197

Released in 1987, the Cal. 6643 with design code 197 was part of Seiko's domestic market collection. It features a Navy dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-db3686ba8d06]

Also known as: UFO, Rally

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

8.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

32j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1987

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