Experimental Proof surface used mainly on U.S. gold coins of 1909 and 1910. This is a hybrid surface with more reflectivity than Matte surfaces but less than brilliant Proofs. ub Term for slight wear, often referring just to the high points or the fields. Letter applied to the coins struck at the San Francisco, California branch Mint.

A hybrid between a brilliant proof surface and a matte surface. Roman finish proof gold coins were struck by the US. mint in 1909 and 1910, although a few examples exist in other years. Some consider Roman finish proofs to be the most beautiful of all proof coins. (Synonym: "Satin Finish").

Refers to that regularly found on proof gold coins minted in 1909 and 1910. These are much more mirror-like than the matte finish but less so than brilliant proofs.

Slightly sharper downward inclination at end of a downface