1cor on 1cor violet with 'Correo Aereo Interior-1932 Vale C 1.00' overprint in black, PREPARED FOR USE BUT UNISSUED, a fine mint copy. Only two sheets of 100 were printed. Very scarce. Expertised 'ELLIOT, N.Y.' on reverse. (See note in SG below SG 723, Maxwell #A69, Sanabria #84)