This watch was made by Errington in 1893 and signed by them ("CHE" plus patent marks) under the dial. But under the face plate it is also signed "Newsome" and the original case, which has the same serial number as the case, has Newsome's maker's or sponsor's mark.
Newsome was a fairly important high quality, albeit relatively small Coventry maker. Prior to c1889 they used Prescott ebauche after that date he became involved with the newley formed Coventry Watch Movement Company and used a similar ebauché by that company.
The watch would have originally been signed by the retailer but it is interesting that they went to Newsome for a watch they could have got rather cheaper direct from Errignton.