FINE QUALITY VINTAGE TOOLS FOR SALE FOR THE COLLECTOR, WOODWORKER, AND ARTISAN. WE ALSO BUY - VINTAGE TOOLS AND 'MODERN' TOOLS BY LIE-NIELSEN, VERITAS, BRIDGE CITY & MORE
No references to this rule that I could find online and this is the first one I have owned. Clearly marked as per above. I believe these may be a blacksmiths rule. Good overall condition.