Crispus, AE18, Ticinum. 2.58 gr.

CRISPVS NOB CAES, radiate head right.
DOMINORVM NOSTRORVM CAESS around VOT star V within
wreath.
Mintmark ST

Bikic-Do hoard, Sirmium VIII Ticinum, 438-439 (2 examples);
RIC VII Ticinum 135 var (bust type), rated R4.

Note: This issue with radiate head is unlisted in RIC
but the note on p. 379 indicates that this type with
mintmark: 
PT is known from Alföldi in RIN 1921, p. 118; 
citing the Trau collection.
TT is known from the Cae Bardd hoard no. 4359 and Alföldi 
RIN 1921, p. 118; citing the Gerin collection.

ebay sale by samhan_53024, Dec. 2011.