Severus II. AE unmarked fraction. 305-306 AD. Trier. 13mm, 1.30 g.

SEVERVS NOB C, laureate head right
VOT X CAE-SS in four lines within wreath. 

RIC VI Trier 685a var (rev. legend configuration). 
Unpublished var.

With permission of cngcoins.com, May 2010.
Very rare. 
Estimate: $300