1975 Dime with Half of Rim Missing. What is this called? Take a look at the reverse side of dime. It’s mostly on the top where the rim be becomes invisible or just not there.
The obverse is a little MAD (Misaligned Die). And the reverse rim is either worn or weakly struck. https://www.cointalk.com/threads/an-overview-of-misaligned-dies-mad-coins.71781/
Agreed. A very, very slightly misaligned die, but not prominent enough to be worth any kind of premium.