Hi, my dad died couple years ago and now i find his watch collection. I know that patek is expensive brand. How can i know is this fake or not?

 

It certainly is.

Google "patek philippe tourbillon perpetuel replica". There are many examples like this.

 

Very fake. Cheap Chinese watch.

sorry for the loss of your father.

 

Sorry but's it's definitely a fake and a very bad on at that.