I have been looking for models of flat cars to carry semi trailers and containers that would be appropriate for 1976. I know that there were
2-axle, 4 wheel cars back then as I have a slide that shows one. The McKean Models front runners I just bought off eBay are lettered as "New 10-84." Were these introduced to the market about this time or is this something that was available earlier and the models are just lettered to reflect a later date?In addition to the Athearn's A/P flat, which I understand has some problems, I'm also interested in what models I should be looking for, both flat cars and trailer/containers that would be appropriate for pre-1977.