First let me say that I know nothing about Patek Philippe watches. However, I have a friend who is liquidating an estate and asked me if I was interested in buying a Patek Philippe watch.
The watch is self-winding with a stainless steel case. The face is approximately 36mm in diameter and the date window is located between the III and IV indicators.
I done a number of Google searches and I have not seen any other Patek Philippe with a similar designed face.
For what it is worth the band is leather and stamped Patek Philippe.
My concern is that the back of the case says "JAPAN MOVT".
Here is a picture of the front of the watch.
Any ideas about the watch.