Maybe someone will find this interesting. WWI era 3006 that is specifically marked “FOR AIRCRAFT USE ONLY”.
I could not figure out how to include images, so here are the links.
[deleted original links Sept 19. New link added below.]
Figured out my image posting problem.
I have deleted the original links and now added a link to the Gunboards posting. The original links were just to the images, but that was not working out for a lot of folks. Hopefully this mess is now straightened out.