Dear Patrick,
happy New Year to you, too!
I think I am able to read PO LIKINNI GALL[...] on the
obverse and EP[...]OY TRALLIANWN on the
reverse, which would give a rather clear indication that it is a
Gallienus from
TralleisWhile I could not find your coin either,,
Imhoof KM, pg. 188, 8, has a 30 mm coin from
Tralleis with a
radiate, draped and
cuirassed bust of
Gallienus on
obverse,
legend: PO LIKINNI GALLIHNOC K,
reverse: left-standing
Tyche with
kalathos,
cornucopiae and rudder,
legend EPI GR M AYR AFRODEISIOY TRALLIANWN. That would
work with the legends on your coin which would of course show a different
reverse.
I could not find a picture of the Imhoof coin (which was in the
Winterthur museum) as it is not represented on Imhoof's plates.
Hope this helps.
Best regards
Thilo