I was given some LP type discs today by a mate who wanted rid, and guessed I'd be interested. trouble is for the life of me I can't work out exactly what they are.
Each disc is about 16" in diameter, and single sided, appearing to contain just one track. All are 331/3 rpm from what I see, and all have
'Special Library Transcription' printed on the plain blue label, with biro marked contents, ie Stan Kenton Orchestra, 7/9/52, Blue Note/Chic, cut-NBC
I guess these might be of interest to someone on here, and assume they must be some form or archive/reference standard disc or similar. Anyone know anything about them?