and found a second source: http://www.ancientresource.com/lots/roman/roman-oil-lamps.html Ancient Roman, Asia Minor, 2nd Century AD.
Neat Roman terracotta lamp
depicting 3 theater masks. With ridge around the discus and continuing as a channel on the rounded spout, pellets around the shoulder and ring handle
; the bottom flattened. Light deposits and a nice type
! 3 1/2 x 2 1/2 in (8.7 x 6.4 cm). Cf.
Bussiere/Rivel, La Collection
2012), p. 180, no. 195 for the type
; Ex collection
of John Hibner acquired in Turkey during military
service in the 1960's. #AR2995: $299