Congratulations.
What is very interesting with this coin, is that there is no K bust type listed, at all, for Ticinum mint in RIC.
And I don't remember to have ever seen a Constantine votive reverse associated with a consular bust for any mint. This consular bust, with scipio, is typical from Trier and London mints, particularly present on BEATA TRANQVILLITAS and at a lower level on VIRTVS EXERCIT issues.
A very great find.