1916 mercury dime

I have this 1916 mercury dime but I can't make out the mint mark. Anybody here have a clue?

 

Log in or Sign up to hide this ad.

No mint mark. Makes it either a Philly or completely worn off, back to the drawing board. Or back to searching.

 

I do not see a mint mark either. Can you post a closer image of where the mint mark would be? In this condition if it is in fact a P mint then retail I would value it at about $4.