It is not a Cud - a Cud involves the coins rim associated with a die break.
I definitely see something on the upper lip in your partial photograph.
I suspect its a die chip, but can't tell by your photo if the object is incuse or proud of the surface.
Tell us about that - and if you can show photos of the full coin both sides.
Take a look at my other hobby ... http://www.jk-dk.art























