truelighth
Just my 2cents worth -
First is the name of the artist PAM -
then the deck initial R&L,A,B,C,D etc-
then the type of back eg: CR=crackle,
then the box colour eg: BLUE, BURG, etc
and any date would be eg: d1919, d1944, nd= 'No Date' mark ...
so to represent a Pam A deck with a crackled back in a blue box printed in 1920
PAM A CR BLUE d1920
It is a good system. Although in many cases the date or even the box is not really known. And if we are writing about the decks, it is not always handy to have such a long code or name. I do think that in general we should use the name of the artist first: PAM-
and then add the deck initial. And there we can just use R&L, A, B, C, D. I would use the A for just the crackled back deck, as I stated before.