a.k.a. Headhunter Mug, Warrior Mug
There are no manufacture markings on the bottom.
My mug has a handle
These common vintage Tiki mugs, produced by Orchids of Hawaii, feature the visage of a tattooed Maori headhunter. Orchids of Hawaii mug in green, marked "Orchids of Hawaii" "R-1" "Japan" on bottom.