While going through some pocket watches that were in storage, I came across something unusual. It appears to be a lady's wristwatch from Bailey Banks & Biddle. I opened the back to find the movement marked with Patek Philippe. This is starting to get interesting. I am assuming that it is a lady's watch because it is so small, 25mm including the crown. After looking up the serial number (on a non-Patek site), it appears to be from 1916/1917. I could not, however find out anything else about this watch. Does anyone have any knowledge about this watch? I found several BB&B Patek pocket watches, but nothing about a wristwatch that is this size or this age.