Caracalla, AR tridrachm of Caesarea, Cappadocia, 24mm, 5.2g.

AY KAI M AYPHLI ANTWNINOC, laureate head right
MHTRO KAICARIAC NEW, Apollo (or Helios) seated left on Mount 
Argaeus holding branch, date ET IZ in exergue (RY 17 of 
Sept. Severus, A.D 209-10) 

Mionnet IV, 148-149 var (rev legend)

The weight seems a bit light for a tridrachm of Caracalla (range 
of examples found was 6.9 to 9.3g). 
Mionnet 148 has MHTRO KAICARI NEWK, ET IZ,
Mionnet 149 has MHTRO KAICAREIAC NEWKO, ET IZ.
Contributed by David Lowe, Feb. 2014.