Looking at both sides of the tokens, courtesy of the NGC Certificate Verification function, I can see that the C25 has been misnumbered as 1184 rather than 1134.

Other than the ever-present problem of overgrading, this mistake is the next most common. It would appear that the button-maker could not locate a decent "3" and instead used a cut-down "8" of a slightly different font.
Hopefully the auction house will also pick up on this, but I won't hold my breath.