Imperial's Bellaire (Octagon) - Catalog 100A, c1913.
Here are two pages from Imperial's Catalog 100A (circa 1913) that featured their new "Bellaire" line - pattern No. 505, or Octagon as we now know it.
The catalogue images are thanks to, and courtesy of Jon D Bartell.
The catalogue images are thanks to, and courtesy of Jon D Bartell.