GUYANA 1986 :- PROGRESSIVE COLOUR PROOFS OF 2 VALUES FROM THE 1986 PRES. BURNHAM MEMORIAL SET IN UM/NHM IMPERF MARGINAL PAIRS.      5 PAIRS ARE OF 120c SG1909 (MAP & FLAGS)  TWO OF 25c (SG1908)      THESE WERE RELEASED BY THE LIQUIDATOR OF FORMAT INTERNATIONAL SECURITY PRINTERS. AN UNUSUAL ADDITION TO A GUYANA COLLECTION.                                                                                                                                                                                                                                                                      PLEASE SEE SCANS