Constans AE follis. Siscia. 2.05 g DN CONSTANS PF AVG, pearl diademed, draped, cuirassed bust right. FEL TEMP REPARATIO, Phoenix standing right on rocky pyre. Mintmark ASIS RIC VIII Siscia 228 FEL TEMP REPARATIO is roughly stated in the context of good times, or "golden age" Ex. @Sallent
Now you need to collect the second version of that Fel Temp Reparatio, where the bird is standing on a globe.
Probably I am weird, but I got caught by the rosette-diademed head of this Constans. Sure, it is very worn, making me just focus on the head ornament and the hair, the mint mark is off-flan (therefore uncertain mint), but still,... I loved it. Billon, reduced Centenionalis, uncertain mint, 337 - 341 AD 14.5 mm, 1.532 g, die axis 180o Ref.: Cohen VII 54; SRCV V 18545 ff.; Ob.: D N CONSTANS P F AVG, laureate and rosette-diademed head right Rev.: GLOR-IA EXERC-ITVS, two soldiers standing facing, flanking one standard in center with O on banner, heads confronted, each holds a spear in outer hand and rests inner hand on grounded shield, mintmark (off flan) in ex.;
Constans, A.D. 335-336 AE17, 1.5 grams, 8h; Siscia mint Obverse: F L CONSTANTIS BEA C, Laureate and cuirassed bust right. Reverse: GLORIA EXERCITVS, Two soldiers, holding spears and shields, standing facing, one standard between them; in exergue delta SIS star Reference: RIC VII 264, p. 470, r3.
Look out for the varieties where the symbol is in the field... The globe types (you don't have to stay at the same mint...) Or even the same emperor
I should also add that Constans' name on my coin is in the genitive case - a type only seen on Siscia coins. Not sure why the celators decided on this.