Some days ago I have found the 6th specimen known for Victorinus COMES AVG:
This piece is not in RIC and Elmer, but both in Cunetio (n. 2519) and in Normanby hoard (n. 1402).
Mairat reference is the n. 564.
The only piece that I have seen in the market is the one from Normanby hoard (Jacquier 1989 and Jacquier 2016). The two specimens from Cunetio are both in the British Museum, but I don't know if the others two from the Normanby hoard are in some private collection or where... (but not in BM I think).
My coin has the same dies (reverse and obverse) of the two specimens from Cunetio.