This is an Illinois Getty, a high grade 187 which was made as hunter or open face. This is a 16 size 17 jewel hunter case made in 1901. They made 1310 of this variation between 1897 and 1903. It is adjusted to 6 positions, temperature and isochronism. As a high grade Illinois 16s for the time, the 187 was a true railroad grade watch (in open face version, some railroads accepted hunters at the turn of the century). For Illinois watches at the time, if you want to look for high quality, look for the statement of "Ruby Jewels" on the movement. If it has that, it is a high quality Illinois watch. The Getty models all have just one single visible winding wheel. The 187 was the main Illinois 17 jewel 16s railroad watch until the 16s Bunn model took over in about 1913.
This watch has a slightly later Burlington 25 years gold filled case, and probably a dial change at the same time as the original may have had Old English lettering.