Gene: Prior to the mid-1910s, these guns were chambered for 44 XL and .44-40 shot
http://www.fourten.org.uk/mwpre410.html

.410 shells can not be safely used in either

If you could post up close high resolution images of every mark on the action and barrel flats we might be able to ID a maker. Janssen Fils & Cie made many for the U.S. market, and the mark may be inside the lockplate



What is the name on the lockplate?