Newfoundland 1941 3c BLITZ Printing Cover to RCAF UK via Trade Commissioner

Cover franked with 2c KGVI and 3c Queen Elizabeth "Blitz Printing" - three days after the printing's first appearance - postmarked with ST JOHN's machine cancel, to serviceman with the RCAF, sent via the Newfoundland Trade Commissioner in London, redirected to Holyhead, no backstamps, some creasing.