It is an Oakland Oriole Torpedo Roadster. That was the smallest model in the Oakland range then. I should have guessed it much earlier, because a 1911 Oakland Oriole has been participating in many veteran car meetings and rallyes for years in my hometown and surrounding locations, regularly earning the cup for the oldest participating vehicle (creating some amount of frustration for a colleague of mine, his 1939 Opel Kapitän usually being the second oldest car
).
