New additions to my collection since the original post (I know I said I won't do proofs, but I couldn't resist!)
I look at that Large Cent blank, and say to myself - "How did that make it 150+ years without being tossed, or mistaken for a piece of scrap?"
More family members arrived today. These are both unburnished Sacagawea/presidential dollars, type 1 (blank) and type 2 (planchet with upset rim). The type 1 isn't labeled " unburnished" on the slab, but it is unquestionably unburnished and lacking its shiny golden plating and appearance.
More new additions: Silver Quarter planchet; Clad Quarter Proof planchet; Silver 40% silver $1 Ike planchet....and...(drum roll, please!)...the Type-II Proof Ike planchet is especially ultra-rare and is a beauty!