The coin is not in Sear's GIC.
The closest match to the reserve on coins from Serdica on Wildwinds is a coin from Julia Domna.
The quite clear '...AVPH...' (oe 'AURE') is not much help either when you look at the legends of MA and LV - but I agree with the posters above that it looks like LV.
The Moushmov listing doesn't mention it either ->
http://www.moushmov.com/serdica.htmlBut on another forum someone asked for attribution help for:
Lucius Verus, Serdica-Thrace
24mm. - 9,5 grs
AV KAI Λ AVPH-ΛIOC OVHPOC, laureate head right.
CEPÎ"ΩN, Tyche standing left, holding ruddr and cornucopiaeand the response given was that in can be found in Varbanov Vol.3
Perhaps someone here on the forum has a copy.