those speedometer break in stickers were never a factory add on . The dealer applied those. ....Any NOS speedometer Ive come across in the box, or seen for sale on ebay over the many years, and the one I have for a 76 550F, never has the sticker. Secondly, there is no part number for that sticker, therefore, never issued by honda as a part for the bike....I wouldn't know if the K2 had one, but if it left the dealer with one, that'd be correct.
My 75 550F still has its sticker. So did my 76 550F I bought in 1976.....which I immediately took off and threw away.....so I know at least they had those stickers.