recently aquired a unopened box train set with paperwork stating set was a promotional offer through Salerno (most likely from 1983).Was wondering what a person did to get this set and any other info about it. The Bachmann box the set came in said P/N AA400457C steam frt rail 40503. Everything inside is unopened still in plastic. Also had coupons for other supplies, etc. Letter from Salerno thanking for taking advantage of their anniversary offer.