A polo ball signed by H.R.H. The Prince of Wales, the white Hanright ball signed in black biro on the sweet spot; sold together with a letter of prov

A polo ball signed by H.R.H. The Prince of Wales, the white Hanright ball signed in black biro on the sweet spot; sold together with a letter of provenance from the original owner who obtained the signature in 1985 at Cowdray Park; and a postcard (3)