James Dixon and Sons Sheffield Silver Plate (?) Pan

This was found at a thrift store and is marked "James Dixon and Sons Sheffield" on the pan. It is also marked "hard soldered". The handle is wooden, and it unscrews much like a chafing dish handle would. The pan itself is very much like a skillet or frying pan, not typical of a chafing dish pan which is usually much deeper. The skillet measures 10" across and is about 2" deep if you measure to the rim. The lid is not marked James Dixon and Sons but has a few hard-to-read markings that are visible when you remove the handle. Someone indicated that the "D" indicates it was made in 1878.  There is one small mark on the pan that is rather hard to photograph, and I am not sure if it is a hallmark or a flaw in the manufacturing process. The lid fits perfectly, however, I have no way of knowing if it started life with this pan or not. I have had no luck finding another skillet/frying pan-shaped item marked James Dixon and Sons.  It was also suggested it may have been used in a restaurant/hotel for tableside prep which would make sense to me based on shape and size. If anyone has any idea what I may have here I would be most appreciative!

Good