So-Called Dollars are a type of collectible coin that are not official currency but are minted as commemorative pieces, often related to specific events or subjects. They typically have a dollar denomination and feature designs that commemorate various aspects of American history. The Hibler-Kappen catalog classifies these pieces by number, including notable issues from years like 1933. The term "unknown" may refer to certain So-Called Dollars that lack a clear origin or established background, making them intriguing for collectors seeking rarities.

Item Denomination Series Year Mint
1933 Mt Hk-820 Montana Dollar Sc$1 Pf Other / Varied So-Called Dollars - Hibler & Kappen 1933 Unknown