Often wondered why the interest.
I guess if you like old time 50’s trains, you would want them? Been into trains since the early 60’s, never seen a milk car anywhere in my travels. You won’t find steam on my layout either. I missed out on that prior era. I do enjoy decorating them for others!
Bosco was made on Staten Island. Always wanted to see a real Bosco car photo but I think it was just a marketing gimmick by Lionel.