I had a look in a book :shock: after seeing Annes comment and....
On page 196 of Circa Fifties Glass, there's a page from the Pilgrim catalogue from 1969. Looks like this decanter in Ruby, called No. 23/R.
Certainly looks the same, although it does appear that the one in the catalogue might also have some kind of optic ribbing going on - could be a trick of the light though. There's also a green one that looks identical without the ribbed effect.
Wow. I'm so glad I bought some books! :shock: :lol: