And more questions!

[danielsand]

Can someone explain to me how were the Erfurts numbered? I know they started each year from #1, but what are the letter suffixes designating? Months of manufacture? Mine has "M" suffix, and I guess, I'd like to know whether it was made while the war was still on, or after the treaty?
Did each year start with "A", and went down the alphabet, or how was it done?

Thanks