Generally used stencils, but there was a website dedicated to them:
The J.W. York Company Research Site.
Note: the above link is through archive.org. The website that's there is no longer maintained because the gentleman that ran it died in 2003.
The J.W. York Company Research Site.
Note: the above link is through archive.org. The website that's there is no longer maintained because the gentleman that ran it died in 2003.