Yes they did I have one, they did light, medium and heavy all look the same just different fillings. The really old ones have white coton lining, newer have blue nylon lining.
Thanks for your replies I've got a really old one thats a medium weight and have just bought one from ebay that looks just the same but is a heavyweight. I wouldn't really have minded if it had turned out to be a medium but I was confused as they looked the same (haven't got ebay one yet). Seems silly to have different weights looking so similar. I wish more rugs had weight labels!!