Watch List notes:

Licinius I (308-324), Aureus, Siscia, AD 312-313; AV (g 5,20; mm 20; h 6); LICINI - VS P F AVG, laureate head r., Rv. IOVI CONSER - VATORI AVG, Jupiter standing l., holding thunderbolt and sceptre; at his feet, eagle; on r., X; in ex. SIS. RIC 212; C -; Calicò 5109.
Very rare, expressive portrait, good extremely fine / about fdc.

The 'X' on the reverse of this coin refers to the celebration of the quinquennalia of emperor.