When he posted his fourth one of these on eBay I asked him if these gaskets were NOS old stock or the ones that were now being made, his reply was that they were about ten years old. Unfortunately I had already purchased one of the first ones he posted. There is a lot of shady stuff that goes on with "NOS" parts. From taking a run of the mill nos part and duping it into a rare nos part with repro parts to putting it into a nos package to just flat out lying about parts. I've been lucky enough to find someone pretty local, honest and knowledgeable who has helped me find parts and takes the time to show the differences between nos. fake, assembly line correct, etc...even guiding me to be very careful with certain sellers. Someone like this is priceless. Buyer Beware it seems.