I have a similar model 1898 Krag rifle. The stock has no 'cartouche' and no "circled P". It does have very nice wood, marked with the small R.D.R., behind the trigger-guard.

This Krag is in very good shape and has a model 1901 rear-sight.

I have always assumed the stock was a likely 'field replacement'. The stock and hand-guard wood are a great match.

Thanks Dick for possible I.D. of Foreman R.D. Roper.