Wow, now that's a real blast from the past. I have that same card given to me by the son of the owner. I first saw the same photo in an old issue of Iron Man Album or similar back in the early 1990s (before you were born Nick?). The magazine must have been 10-15 years older than that. I was a new but eager collector then and of course there was no internet, Ebay or email. But I was able to track down the owner near Dayton OH and made a phone call. I asked for the him and after a long silence the woman said it was her husband and that he had passed away a couple of years earlier and that they hadn't opened the trailer since then. She and her son did allow me to come up (an exciting 6 hr drive) and we opened up the trailer and I was able to buy an Essex hot air engine and another small German steam engine, but most of the things I didn't want or couldn't afford. After getting back home the son called me back to say he'd found two more engines in the attic--turned out to be a small Marklin machine shop and a rather large Marklin 4149 with a Doll lineshaft and tools. So made another trip and bought the workshop while a friend bought the other Marklin. Another friend ended up getting the Colt Baxter model shown at the far left on the card. I had an auction of nearly all my 70-or-so engines back in 2000 when I thought we were moving overseas and regrettably the small workshop went was sold then. I will try and scan an old photo and post here.