I have a 1977 bag of 50 cat's eyes Made in Mexico distributed by Imperial. They range from 2 floating vanes, 3 4 and 5 vanes up to the standard 3 colour 6 vanes. A mix of pastel and bright colours, one with a little green aventurine,. straight vane and the common S shaped vanes of Vacor. Without the header label you would never pick half of them as Vacor. I would assume they were having problems with blocked holes in the crucibles. Sorry but I haven't learned how to take photos yet.