Some days ago I bought this "très sympa" coin:
D\ IMP C POSTVMVS PF AVG
R\ FECVNDITAS AVG (rev. of Salonina)
the surfaces are silvered and the style looks as an official issue, but it's a cast copy made with two different official coin (Posumus and Salonina).
An interesting example of fraudolent local issue.
Do you know other hybrid issue like this one (Postumus/Salonina)?