Could not it be that Sol is Conservator of the Augustus on the reverse and also, as a consequence, Conservator of the Augustus’army as represented on the shield of the Augustus on the obverse (Sol cult seemingly very common amongst the military during the 3d century), through/because of Probus’ Virtus ?
Sorry to discover this post so late. This coin (and its
obverse die) is an
unicum: I completely agree with
Amictus, in seing on the
shield held by
Probus on the
obverse,
Sol, right hand stretched and holding a globe in the left hand (the globe is quite visible, and the personage is naked) in the personification haranguing the soldier, replacing the usual image of the Emperor in
military attire in an
adlocutio. This image on the shied held by the Emperor on the
obverse responds to the
reverse CONSERVAT
AVG //TXXT, showing
Sol with the similar attributes. This coin which belongs to the 3rd em. in
Ticinum can be compared with another
unicum (
Solidus sale 22, 2014, 228) belonging to the same emission, showing the same
obverse and the same CONSERVAT AVG/
Sol reverse, but showing
Sol's
radiate head left, on the
shield held by
Probus on the
obverse.
Very interesting coin, to be compared with the medallions struck at the same time in
Ticinum, displaying on the
obverse the
jugate busts of
Probus in arms (armed spear and
shield) and of
Sol radiate, as "war companions" on an equal step, with the
legend IMP PROBVS INVICTVS
AVG: the assimilation of
Probus to
his companion and
conservator is clear.