Please help ID and date this propeller

[bedcheck]

I am selling an old prop on ebay and would like to identify it first.
It has the following markings

8' 4"
P.5'3"
.OX5.
585
S.C. 51790

thanks











MWP_Lamar inserted pictures.

[MWP_Lamar]

Do you have good pictures of it? If you like, feel free to email them to 'em to me and I'll post them here. Just click on the email icon near the bottom of this message.

Lamar

[MWP_Lamar]

Pictures are now posted above.

[dbahnvt]

It's a "toothpick" style prop most likely used on a Curtiss Jenny with an OX5 engine. The "S.C." is a Signal Corps number of no real significance. The other numbers refer to its diameter and pitch. That style evolved from the need to reduce manufacturing costs, since there were a large number of nose-over type crashes with the Jennies which destroyed to prop. The toothpick design required less wood to manufacture.

Obviously, a section of the trailing edge has been removed.


Here's another example of one.