Is this authentic and worth anything?

[moth898]

I found this RC10 body at the hobby shop. Its been painted but I'm not sure associated factory painted bodies back then. From what I researched on it looks to be the earliest body for the RC10. The only thing that is different from others I've see is that the label reads 6160X, where all the other ones only read 6160. Does the extra X at the end mean factory painted? The plastis bag it's in is sealed all around. I don't know anything about associated so can anyone help me with the history?