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
Have it examined by a gunsmith
Yes.
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.
Before WW2.