I haven't found so...but I am no expert by far.....Maybe mine were too far gone....I have pile (I don't bother to wrap in white 2X2) of say 10 dateless,,,,wrapped buffalo's say 15 coins or better all different.....

after the vinegar, I do usually put on some olive oil,(Not as good as Veri-),, but I don't have a bottle of that yet so.......
