AE quadrans, 15mm, anonymous issue, struck under Antoninus Pius, AD 
138-161, coins of the mines. 3.48 g. Possibly struck in Caesarea, Cappadocia.

No legend, radiate head of Sol right.
METAL-AVRELIA-NIS in three lines. 

Woytek, Metalla IX; RIC 1255 var (obverse); var of Cohen 118 and 121 (ditto).

Very rare. 

with permission of cngcoins.com, May 2015
Estimate: $200.