Perhaps this thread can grow with items people pick up that they have never seen or consider oddities. I mentioned a couple weeks ago I picked up a load of curbco trash and amongst the items I got was something I had never seen before. It is 4 inch snap together ducting, but instead of aluminum or galvanized, it was copper. Pretty thick, too. I thought it might be interesting to show you guys. Has to be from an old cracker house. My guess would be '30's or '40's.
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