The Jordan Printing Company was located at 411 - 10th Street, Oakland, California.
In 1910 the company advertised that "Every Man to his Trade ... We are Printers. We also Manufacture Rubber Stamps and have for sale all kinds of Rubber Stamp Supplies. We are fully equipped for the Manufacturing of Union Buttons, Mirrors and Celluloid Checks."
[Question: although know what celluloid is, what were "celluloid checks"??]