I have two of these, they are slightly different but are both for the Adaptall-2 series of lenses from Tamron. First one sold will get an aftermarket rear Nikon fit cap, as I only have one left. Looks like one adapter goes on eBay for $25-$40 USD, so how about $25 shipped for one, $35 shipped for both. One has the ears/prongs/whatever else Nikon called them and is labeled N/AI. Looks like some shop/bag wear but not very much if any real use. The other has no prongs/ears and is labeled "Adaptall-2 for NIKON AI-E" and looks to have been put to use at some point but is definitely not beat up. Items are located in 92116, San Diego, CA, USA. I'll take Paypal or USPS MO. Int'l welcome but postage is covered by the buyer.