Patek Philippe Calatrava 1578

[Patbb]

Hello all,

I am a recent member of this forum and have already found the content and input very interesting and helpful.

I am considering purchasing a Patek Philippe for my father who has always been a huge fan . I am very much a novice when it comes to PP and would very much welcome comments as to the authenticity of the attached watch. Thank you very much for your help in this regard.

Many thanks,

Pat