All five of the razor hones are NOS unused - Some are different colors and I assume maybe different grits, but I can't really feel a difference. The carborundums in the blue boxes are #125's (6 x 2 x 5/8 MEd grit) - they appear unused. The other older carborundum is a double grit 8 x 2 x 1 - it is in a much older box and is dirty, but I believe unused. It has a beautiful label on the side. Thanks for looking - if you have a few minutes, I have many other tools listed in my Ebay store, Also, I have 20 or so additional NOS razor hones by Crescent. (LS8/2 - 723)
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