H.C. Corbin must have been mistaken. This circular went out some years after the Krag came out. Could have been the person typing the circular misinterpreted it and Corbin didn't proof read it very well leaving the verbiage "Model 1892" stamping in. I have no other explanation. Unless he "assumed" that there were "MODEL 1892" stampings and those reading it may not have given it another thought. They weren't going to find anything that didn't exist anyway. Perhaps this is the most scrutiny this circular has ever gotten, over a hundred years later.