Comments: Oak propeller manufactured by the Harriman Industrial Corporation in Harriman, NY, probably in the late teens. Very little is known about the company or the propeller, but a brass plate identifies it. Note the scribed lines defining the bolt hole circle and the drill centers, as well as the center bore diameter yet undrilled. The dimensions and shape are virtually identical to this propeller, and with a scribed bolt circle of 5 1/4" and a scribed center bore of 2 11/16" this was almost certainly destined to be used on an OX5 engine. While it cannot be determined with certainty, I believe the most likely use would have been the Curtiss JN4D, or "Jenny"