I have 7 of these in my collection. Some with the marking on the back and some with it on the bottom.
Collector Gallery
Tiki Mug Design
The Tikis Monterey Park Black Moai OMC Mug
in 59 collections
Relatively traditional-looking black moai mug, with a concave base, manufactured by OMC, and here used by The Tiki's in Monterey Park, CA. Stamped as such on the bottom, with foil diamond OMC sticker.