1928 ¼ a printed on thick glazed paper perf 11 complete sheet of eight using two impressions from the setting of four clichés, top setting of four printed in indigo and the bottom setting of four printed in bright blue with error, 2nd, 3rd and 4th row of perforations missing resulting in two vertical strips of three with stamps imperf between. Not listed in SG and most likely unique, certificate ISES 2021.
