None of the mint staff in 1992 were around in 1792, but I suspect somebody on staff had been around in 1968, or at least paying attention to coins as a child, when they moved the mintmarks on quarters. If you look on the other side of the medal, you'll find a 1932 quarter with the mintmark on the obverse. Oops

U.S. Mint Bicentennial Medal Reverse

Pictured here is the reverse of the United States Mint Bicentennial Medal.

My first assignment as a Sculptor / Engraver at the Mint was to re-arrange the elements of the Mint’s internal competition winning entry.

When it was approved, I proceeded to carve backwards in the plaster negative, the entire fifteen coins on its face.

It was sort of a “Trial by Fire” for me, and an introduction of my style of work to the management at the U.S. Mint.