The Vintage Wrist Watch Company has dated this piece to the 1910s.
Ingersoll was a very popular brand at the latter end of the 1800s selling $1 watches by mail order.
Their advertising slogan was "The Watch that Made the Dollar Famous." Ingersoll purchased the Trenton Watch Company in 1908.

A 1911 advert for Ingersoll Trenton watches quoted… “The 15-jewel Ingersoll Trenton movement is as beautiful a watch as any man may need ask for. Its precision is more than most men require. It will give a full generation of faithful service and with the superior patterns and choice designs of the gold filled Ingersoll Trenton cases it makes an irresistible gift for a man.” At the time, the model as we have here retailed for $15.

This particular watch has a fully signed stem-winding movement which is working nicely.
The watch itself measures 49mm diameter excluding the winding stem and the loop. The case is gold filled and was originally guaranteed for 25 years. Overall it is in good condition with just a couple of scratches to the screw-on back, the longest of which is about 1cm long.

The watch glass is in good condition.
The signed double sunk white enamel dial has a couple of faint hairlines to the centre section but they are not immediately noticeable to the naked eye. Blued steel hands, a subsidiary seconds dial and outer minute markers.
The watch comes with a single chain which measures 31cm long including the T-bar and the clasp.
The watch and chain will be sent in a new presentation box.
The Vintage Wrist Watch Company has dated this piece to the 1910s.
Specialists in antique and vintage wrist watches and pocket watches
You can view the stock and full dealer information on the The Vintage Wrist Watch Company Profile Page