I have a mid '70s Heritage Travel Trailer (35'). It didn't come with any paperwork so I'm trying to get the important info to register it. I found what looks to be an old punch card. The top of it lists model number - TB 12SWB RAD. It also has a serial number. I guess that is what will need to be listed on the bill of sale? I thought trailers have a tag up in the front but there is nothing on this one. Maybe they put them somewhere else back then. I also came across an owners guide. It lists - Heritage Industries LTD, Edwardsburg, MI. I searched but didn't come up with anything. I have a feeling they closed up or were bought by another company. Can anyone point me in the right direction? Thank you!