I have no reason at all to think this is anything but all original ( except bracelet) however I am way out of my league so I wanted other eyes to confirm. This is a reference 3423. Not sure of date but I would assume late 50's - early 60's. Freccero is a Uruguayan Jewelry retailer that sold and signed Patek at one time a la Tiffany. Does this add any extra value to this Calatrava? Is there anything about this piece that would add more value than usual ie style, dial design etc. By chance I came upon the opportunity to make an offer on this piece.