Below is a Constantine I VLPP from Siscia with a horseman on the shield, except the horseman is leaping to the left instead of the normal right. I have seen quite a few of these over the years and this is the first example I have seen like this. This is probably only something that would interest a collector of this series, but I though it was very interesting. On a side note, these coins with the leaping horseman were only issued from officina B.
The first example below is the left leaping one and the second is the normal right leaping, both are RIC 61.
Constantine I
A.D. 319
20mm 2.6gm
IMP CONSTANT-INVS AVG; high crested helmet, cuirassed, spear across r. shoulder, shield with horseman on left arm
VICTORIAE LAETAE PRINC PERP; two Victories stg., facing one another, together holding shield inscribed VOT PR on altar.
In ex. BSIS dot
RIC VII Siscia 61