bronze disease?

[VonDrobac]

is this bronze disease or something else?
I tried to take off a little but it is very solid

[Mark Z]

VD,

If it flakes off into dust with your fingernail it is bronze disease.

This looks more like some type of deposit, most likely harmless.

mz

[VonDrobac]

thanks for the reply Mark

will keep coin though is worn, I like a portrait.

VonDrobac

[Mark Z]

VD,

Yes, an excellent portrait and certainly a keeper

mz