Original Discovery radio

I have an original Discovery radio, which I bought with the intention of fitting it into my Discovery, but I sold it before I got chance. I don't know any of the specifications for it, as I don't know how to find them out. If someone knows how I could find them out, please could you let me know? Then I can sell it to anyone who might want it Cheers!

Might be worth putting up a pics or part number as there are a few options.