I buy and sell silverplate flatware. I have picked up a spoon with a very unique picture in the bowl of the spoon. After a lot of confusion I see the St. Clair Tunnel on it plus lots of other cities listed that must be the railroad lines. Both in Michigan and Canada. The confusing part is, not to be crude, but the maps are on the bodies of two pigs that are screwing. I am trying to figure out what that part means. I will be selling the piece and want to know more info about it. Does any one know any train memorabilia experts that I can get ahold of?????