That's a really beautiful bike. It's hard to narrow it down more without a proper serial number.

The 82216 stamped on the right rear drop out seems to me to be some sort of manufacturing code. Note that almost all of the bike in this thread with a number in that location end in '16' with the lone exception being the mixte that ends in '17.'

There really should be a seven digit number stamped either on your left rear dropout or your bottom bracket. These can be really hard to see.

I'm not sure what to make of your component mix. Being a Grand Record, it should have Nuovo Record derailleurs. So I don't think the particular components tell you anything at all.