hi, I bought some years ago a PP 2451 in really nice condition, but.... Never worn just because I find et too little his 31mm. Now, just smell different and I find it totally cool.
BUT..(.must to be a BUT in a fairy tale) the buckle is a generic one, and now its time to fishing a correct one.
Please someone could give me some indication about the buckle (maybe where should I looking For?!? to be sure about originality)
Thanks in advance to all pp enthusiast

 

Ah, just to know, this watch is exactly like mine!

 

Or, if someone could tell me how to spot a fake one.... It would be very appreciate

 

I'm assuming that your strap is not an 18x16 thus the need for a smaller buckle. Here's one:

• 
  
  PATEK PHILIPPE 18K SOLID YELLOW GOLD 18ct 13mm TANG PIN BUCKLE CLASP Really NICEPurchases made through these links may earn this site a commission from the eBay Partner Network
  $495.00
  Buy It Now
  
  PATEK PHILIPPE. Patek Philippe. “PATEK PHILIPPE. PATEK PHILIPPE 18K Yellow Gold. 13mm buckle will fit all. Tang & Buckle. And “ 18K” on Tang. 13mm at the extremity of the strap (buckle end).