Looking through some coins today. At first I thought it was a hit. On obverse between R and T. It is raised. It stood out to me. I did read this date did have some.
@PamR Commonly called a Spike Head. Here is a link to Mercury Dimes that have been listed. One looks just like yours but a different date. Mercury Dime Spike Heads: 1916-1945 – Cuds on Coins
