Here’s my lowest mintage US coin, with a suspected mintage of 16,000: Its mintage isn’t as low as the proof coins that others have posted, but years of attrition have whittled down the number of survivors to the 400-500 range.
I bought this one in a SEGS holder graded PR64RB. I sent it in to NGC and they detailed it with "altered" color...
The coin was designed by James Longacre, fourth chief engraver of the mint. He also designed the flying eagle and Indian head cents, the two cent, the silver and nickel three cents, and the shield nickel. The design is often called the French liberty head because the portrait on the obverse is similar in style to contemporaneous French coins. Longacre did a number of half dollar designs with this obverse which are pictured in U.S. Pattern Coins, 10th ed by Judd. There were 12 different patterns (Judd-237 through Judd-246). They all had the same obverse, but there were 5 reverse designs. The reverse designs incorporated either a wreath or an eagle. There are silver and copper versions of each pairing. And one design variation also has a mysterious letter H on both copper and silver versions. All are rare with fewer than 200 coins produced of any one type. Some are exceedingly rare with fewer than 10 produced. The letter H varieties are unique. Beautiful design that was never approved for production. Cal
U.S. coin, 1840o Seated Liberty Dime NGC EF45 with a mintage of 230,000. Foreign, a 2015 Australian Wedge-tailed Silver Eagle PCGS PF70 DCAM (not a high-relief) with a mintage of 4,046.
My US Philippines 1908 proof piece comes from a mintage of only 500. The common ones that year were made in San Francisco, while Philadelphia made all the proofs. https://en.numista.com/catalogue/pieces6696.html
By "sort of," you mean because it was 100% part of the US at the time it was minted? Or because of the clear and unambiguous "United States of America" legend? Yours is a beautifully toned example, btw.
If you exclude the Proof coins that I have, which have business strike counterparts, it might be this Pan-Pac $50 round with a net mintage of 483. I don't collect very many pattern coins. The only "real" one I have is this 1836 gold dollar. I don't think that there are any mint records on how many of these were issued, but it's probably less than 483. This is the most common U.S. gold pattern coin. My guess would be that the mintage has be less than 250.
Thanks! I wrote "sort of" because many consider these as either territorials or world (and not part of what is commonly referenced as US coins).
My US lowest is pretty lame, I think probably the 2016-D NPS half dollar clad UNC at 21,335 (possibly not a final number). For any coin, Canada 1947 Maple Leaf Curved Right 7, actual mintage unknown, likely less than 200 survive in both MS and SP.
I have 3 that are fairly low mintage. An 1879 Trade Dollar, 1541. An 1880 Trade Dollar, 1987. And an 1873 Pattern Trade Dollar-J-1293 which is a rare 4. 76-200 known. My 1879 TD.