Gene, your input is always appreciated and valued. You may very well be right that it is a question without a provable answer. It is hard enough keeping up with current releases never mind going back 35-40 yrs. I thought when I posted the original question that it would at the least get members focused on the hobby and not each other. If that has happened then I accomplished my mission. Still looking for the month the Hilton International chips were released. TKS