Anthologie Sonore was over 160 - and that's only the 30cm stuff. not including the 6 or so 25cm discs for Mozart's 'Bastien et
Bastienne.
National Gramophonic Society isn't exactly a 'set,' but it is sort of a
unified concept, AND one of those things you'd like to have all of which if you could get 'em!
Mike in Plovdiv