Not OP and don't know for sure but here is the warranty language:
"Nikon’s Lifetime Limited Warranty applies to the optical system components of Nikon Binoculars, Rangefinding Binoculars and Fieldscopes, which optical system components are warranted by Nikon to be free from defects in material and workmanship for the lifetime of the product from the date of purchase by the original consumer purchaser from a Nikon Authorized Dealer."
May need to contact Nikon to check?