Here is a very common reverse type for Constantine with an unusual decoration on the shield on the obverse. RIC Sisica 61 with an unusual decorated shield variety. Shield decorations have been discussed on many CT threads, including this one: https://www.cointalk.com/threads/a-special-fh.304298/page-2 VICTORIAE LAETAE PRINC PERP BSIS• Glossy near-black surfaces. [$69 + $4 shipping in the US. $3 more elsewhere.] For other Constantinian coins, visit: http://augustuscoins.com/Constantinian.html