Be careful if you start collecting S&W buckles. As Ed stated, there are a lot of fakes out there. Just because the buckle says Smith & Wesson or the Seller states that it is a genuine S&W buckle, check here first. I own several knock off buckles that never saw the S&W factory or were never authorized by the company.
This is also true for S&W patches. There is a guy on fleabay selling all sorts of S&W patches that are all fakes or copies of real S&W patches. Buyer beware.