Im also interested in knowing what version my wallet is. I reckon it must have been around 2013, but im not sure what actual current wallet.dat stuff is on the file right now. Is it possible to find out?
for HD vs Non-HD import to core. when core is running look at the bottom right of the UI, there is an HD icon, mine is greyed and lined out, so Non-HD. if its lit (or not lined out) its HD.. afaik anyway
as for specific versioning dunno..
edit
windows versions for the most part
Yeah, I remember the icon being greyed or lined out, so it's an old wallet for sure, however, im not sure if further Bitcoin Core upgrades may have modified the wallet in some way. I do not remember ever performing any manual upgrades to the wallet file, so im not sure if it's the same as day 1 from it's creation, or some modifications were made on the file.. achow mentioned some upgrades on that list, however, im not sure if that list means every time a new wallet format was introduced, but I don't know if that includes automatic upgrades to existing wallets or not.