Magnentius, 351-2 AD. The second pic should be rotated about 135 degrees clockwise.
Obverse: DN MAGNEN-TIVS PF AVG, bust of Magnentius right, A in left field. Reverse: VICTORIAE DD NN AVG ET CAE, two Victories holding wreath inscribed VOT V MVLT X, star over SV in field, mintmark RPLC (?) for Lugdunum. Tesorillo 111, Numista 92345.
I'm not sure if this coin is valuable. AFAIK coins of Magnentius are popular, but there seem to be some signs of damage (?) that might make it less desirable. I very naively estimate $10.