Excel was a trade name used by HD Folsom Arms and Iver Johnson Arms and Cycle Works on shotguns made for Montgomery Wards.
Is this shotgun manufactured with a twist steel barrel
Numrich Gun Parts Corporation have most, if not all of the parts for an Excel shotgun. They are located in West Hurley, NY.
Take it to a gunsmith
1893-1932
Under $100.
No published sn data. 50-160 USD or so
Depends if its damascus steel or not.
No published sn data
Yes.
Have it examined by a gunsmith
The value of a sears nitro excel 16 gauge single-shot shotgun can vary widely depending on its condition, rarity and any unique features it may have. Firearms values change overtime and may not have significant collectors value.
Turn of the century, inexpensive arm.