Thanks, that makes sense. And no, it's not Schirmer - it's Ricordi - whatever/whoever that is; I can't remember where I got this music - it's printed in Italy is all I know. But it amazes me that they put in all these 1-cord, 3-cords markings. That's going to make playing this piece a lot different now.
Giulio Ricordi was an Italian publisher (now I believe that the publishing house is part of the Sony BMG group). Who's the editor of your Bolero? Beniamino Cesi or Attilio Brugnoli?
Concerning the 1C/3C indications, bear in mind that that edition is several decades old, probably conceived at the beginning of the last century. Said that, a quick comparison with my PWM/Ekier reveals that the only difference is just about those indications! And they make a lot of sense to me. You have loud repeated chords in the LH and the pedal down, how could you possibly deliver those diminuendi?