That is the exact sticker I saw on a 1969 CB750K at a vintage show in WI. It is owned by John DeBeck the director of the VJEMC (Vintage Japenese European Motorcycle Club) based in Green Bay, WI. I took a picture of that sticker as it is same one on the KO which I am restoring. It is located on the top of the right side cover. I am not sure how long that one was used, but 1969 - 1970 that I know of. In fact, I am looking for one of those. Have any extras? Thanks...