'75th Anniversary of the Postal Service' EXTERIOR issue sheetlet of four containing the variety 50c ERROR OF COLOUR (printed in Black & blue the colour of the 15c), IMPERF unused. (Maxwell #A240da, SG 999e/h Variety).
'75th Anniversary of the Postal Service' EXTERIOR issue sheetlet of four containing the variety 50c ERROR OF COLOUR (printed in Black & blue the colour of the 15c), IMPERF unused. (Maxwell #A240da, SG 999e/h Variety).