Mickey Mouse Watch made by Romero Britto By Acme that never went into production

This watch was designed by Romero Britto and made by Acme Studios for The Walt Disney Galleries in 1996.
I have the original box it came in. When I wrote Acme they said they made the watch but it never went into production. I bought the watch at an antique estate auction in Boca Raton, Fl and noticed there was no serial number where the space was left for one. I have tried to find another and have never found another and would like to sell this one but have no idea where to start.
If anyone has any information I wouid greatly appreciate it. Thank you. Chris