Uncancelled dies made at the U.S. Mint are extremely rare in private hands. These have been authenticated and certified by NGC. In addition to the unique Martha Washington Cent Size Uncancelled die, there are two known that are Half Dollar size. A 1967 Philippines 10 Sentimos Uncancelled obverse die was also certified and featured in the NGC article on Uncancelled dies. Recently, five Uncancelled Costa Rica dies surfaced, including the unique 1897 2 Colones proof obverse die.

This is the only known Martha Washington Cent-Sized Uncancelled Die in private hands. It was featured on the cover of Mint Error News Magazine Issue #51. There are only four other Martha Washington Half Dollar-Sized Uncancelled Dies known in private hands, two mint state and two proof. These half dollar Martha Washington Dies were purchased by Mike Byers. The first one discovered was featured both in Coin Week and on the cover of Mint Error News Magazine Issue #44 (Spring 2018).