So I bought a house from a guy who was a bit of a hoarder. The house was built in the 60s and he was the only owner and when I was going through the attic, I kept noticing boxes of old antique thermostats. At the time, I didn't think anything of it. I just went through the boxes again, and it appears they are very old and possibly worth a lot of money. I haven't counted for sure but it seems that they are around 30 or 40 total.
Almost all of them appear to be Honeywell. They seem to range in various ages but nothing close to being modern. There are some round, some rectangle, vertical reading, horizontal reading, cast iron, plastic, some with clocks, some in the original boxes with original paperwork, etc. I will try to get some pictures of them more in depth tomorrow. Most of them seem to have been kept very well and a lot of them are wrapped in cloths to preserve them.
I might be looking to sell them on here but I honestly am really just looking for more info about them and their age. I will try to edit this post sometime tomorrow with in-depth pictures and serial numbers and whatever else I can find. In the little research I have done, this collection seems to be very extensive compared to what I've seen. Any info or sites with guides would be greatly appreciated because I am not an HVAC guy and know nothing about it. Thank you.