This coin is not in RIC for the long obverse legend and the bust type. The shield is engraved with a group of soldiers holding up shields and spears. It is listed in
Die Römische Münzserie Beata Tranquillitas in der Prägestätte Trier 321-323 (RMBT) as # 190. The Not in RIC site has three examples already --
http://www.forumancientcoins.com/notinric/7tri-426.htmlCrispus
A.D. 321- 323
18x19mm 3.0gm
IVL CRIS-PVS NOB C; bust l., helmeted, cuir., shield on l. shoulder, spear across l. shoulder, Victory on globe in r. hand.
BEATA TRAN-QVILLITAS; globe set on altar inscribed VO/TIS/XX; above, three stars.
In ex. STR crescent
RIC VII Trier -- ; RMBT 190