See US Patent 804,901; Nov. 21, 1905 at the link:
Does anyone have any idea what that second number represents?
Patent # ?
996m fits the 743,inch and one half wide
if you have a y4 or gst blank, try one ?
i have 2 of these 745's and could not get an original so for now i used a y4 and a gst
Yale 745, image from Yale & Towne Cat. No. 26 (c)1929, click thumbnail for larger version:
I'm assuming pat.1-21-05 means it was patented January 21st either 1905 or 1805?
My supplier did not have 994M which is why I bought 996M...I will have to keep looking.
Do you know what model this padlock is?
Try Ilco 994M (old Yale 11C1R or No. 6)