Thanx for prompt response!
Yes GUY, I absolutely agree with you that coins are among the best sources of information (especially for portraits) about the emperors.
The most known bust of Probus is from Capitoline Museums, Palazzo Nuovo, first floor, Hall of the Emperors but my opinion is that sculptor was very poor. There is only few things on that bust in connection with coin portraits of Probus.
Bryaxis Hecatee you are right, with little help of Bill Storage ( http://rome101.com/ ) I found that mysterious Probus is located in National Archeology Museum of Napoli under Inv. no. 6100.
Now I need someone from Napoli to help me...
Thak you for information of Brescia gilded bronze Probus... terrible sculptor! I heard about Probus in Brescia but I never found picture. Need to check it. I found errors in that Picassa album: author named this picture ( https://picasaweb.google.com/lh/photo/1MuKjXgi4PdLXvugevAT3w?full-exif=trueas ) as Gothicus but that is probably Aurelian ( http://en.wikipedia.org/wiki/Aurelian ).
My opinion (very personally) is that portrait of Probus from Napoli (https://picasaweb.google.com/garrabranco/ROMA2#5197785217034029458 ) have a lot of Probus character from coins, even if it is not portrait of Probus... I will report about new details in this investigation...
Best Regards
Vladimir
(sorry for my English)