I am not sure how to open the watch to get to the movement, so I do not know the symbols or movement model of this watch. Was given to my grandpa in 1944. In the pictures the watch looks gold, but it is a silver color, but it has a strange gold tint in different points of light. (The info I had received earlier is wrong It was not 1926 like I had originally said. I found a picture of my grandpa the day he got the watch, and it is dated 1944.
The seconds-dial on the watch has no number on it. Serial number on the back of the watch is 2771896. There are some numbers scracthed onto the inside of the back cover, but there are some scuffs and I cannot read what they say. I cannot find a clear symbol on the movement as to date the year exactly, but I think I see a "T" shape like the one used in 1942, but it is hard to make out.
Judging from the patina it's yellow gold, very worn over a sterling silver base, thus the silver color is dominant. It could very well be white gold plate, still very worn and I really believe the base metal is Sterling Silver. Add a new crystal and it will look fabulous.