The German made Voigtlander Vitoret was introduced in 1963, shortly before Voigtlander was taken over by Zeiss Ikon. The Vitoret was manufactured until the early 1970s when Voigtlander was sold on to Rollei.
This book is easily the most comprehensive book on HIT-type cameras there is. If you're serious about collecting these beautiful creations, make sure you grab a copy.