To avoid too long explanations I use shortenings and my own systems in my Danish collection.
I have given the main label a number.
The neck-label has a letter.
The backside label has a roman numeral.
After the label form follows:
The contents quantity, if that is 33 cl, is it rare that it is mentioned.
The colors on the labels.
If the label/can contains a productionnummer is it written.
Often stands a number in the end, who starts with two capital letters, for example TU056. That is a nummer, I have given the beer in my collection.
Following shortenings is used:
Kl. = Taxation class.
Ny dekl. = deklaration which contains antidoxidant and more.
Skr.= writing type
år?? = when I don't know the year.
1971-78 = the label has been used between 1971 and 1978.