I'm not a watch expert. But I like beautiful watches. I wonder if there is a way to tell if this is an authentic Patek Phillipe? I did Google the number on the back, if that is the model number, and found a number for sale on the internet, though they do ...
First I don't know what the 5059 reference is supposed to mean. I have a 5059 and it's a retrograde perpetual. Second no PP shows the year in a calendar watch