Province Macedonia
City Thessalonica 
Region Macedonia
Reign Valerian and Gallienus
Obverse inscription ΚΟΡΝΗ ϹΑΛΩΝΙΝΑ
Obverse design diademed and draped bust of Salonina, right, on crescent
Reverse inscription ΘΕϹϹΑΛΟΝΙΚΗ ΜΗΤ ΚΟ Β ΝΕ
Reverse design laurel wreath enclosing inscription in four lines

 

Reference CGT coll.
Diameter 24
Weight 5.31
Axis 12
Note the weight is as stated at 5.31g, which is confirmed (very thin flan)