To add to @apacheguy's post, an A pack isn't always the dreaded A pack - the version letters only apply for the same base part number (for @SPXMike's pack, 1107172-00). My 2014 pack is 1014114-00-E.You got a first generation A battery. Wonder what the range is on a full charge... Your supercharging will be limited to 90kw due to the early battery. Maybe you have a classic S?
When Tesla issues a new part number, they reset the version letter to A, so the whole "A pack" thing fell apart when they issued new part numbers for packs. The first 90 and 100 kWh packs would have A version letters as well, since they get a new part number. Think of it as <major version>-<minor version>-<revision>. This is pretty standard for automotive part numbering.
I don't know what they did for the software limited 60's and 70's - if they used a 75kWh sticker and part number or a new one to hide the bigger internal capacity - I've never seen one of those packs in person. I should check a friend's 60D the next time I see it.