disconnected the battery and poof

I have an Alpine 10 model mf2199, and its S/NO.

how can I get the code ?

Thanks

With proof of ownership (registration), vin and S/N the dealer should be able to look it up.

I put it in an '84 SD, the dealer goes by the (original) VIN # of which I have no idea
I just spoke with them and they cannot access by the radio SN #

You may need to send it for decoding:

www.perfectmarketaudio.com/decode