Yeah, from the above contest , I presume that BM = Black Mission.
Often. I have tacked my Black Madeira as "Blk. Mad.".
In my very first short-hand tagging, I used to to mark them
with the first 3 letters; .... then came multiple "Adr" 's........
A sure fig tagging method is very important for all of us.
First mark the twig; write on the pot itself, use additional labels, numbers,
tags - plastic/vinyl tend-to-fade - use Al or Cu ones.... etc...