I recently purchased 100 Crystal Israeli DE blades on eBay. I had used some from a sampler pack and loved them. The blades I received had the proper packaging, but the paper that holds the blade is missing all the classical making of the blue Super dot and blue Platinum wording. The blades are harsh and dull.
Then I noticed that the blades were missing some of the number/letters usually found on production runs such as ABCD or D11. I had a few of the blades from my sample pack, so I tried them and the experience was radically different. No irritation and only a few passes for a good shave.
Is it possible that these blades are not genuine? I find it hard to believe that there would be a market for knockoff blades.