apparently only the gold ring products... see faq item number 8http://www.leupold.com/corporate/resources/faqs/
8. How do you rate your binoculars? (Which models are better than the others?)
Similar to our riflescope product line of VX-1, VX-2, VX-3, etc; we have redesigned the features and performance of our binocular and spotting scope product lines align w/ riflescopes regarding the different levels of glass quality, internal lens coatings, external lens coatings, etc. Our entry level products are labeled as BX-1 for binoculars and SX-1 for spotting scopes; mid level products are labeled as BX-2 and SX-2, High level products are labeled as BX-3; our premium level “made in USA” products will include our familiar “golden ring”.
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- James Madison