Newfoundland #C6 Otto Hillig & Holgar Hoiriis Flight Cover

Newfoundland Flight Cover with Canada Airmail #C6 and Aerial Service cinderella seal - 1931 Otto Hillig & Holgar Hoiriis (signed) Non-Stop Trans-Atlantic Flight, Harbor Grace. N.F. to Coopenhagen,Denmark via Plane "Liberty"
Cancelled Harbour Grace N.F. with back cancel St. John's N.F. and Copenhagen

AAMC 1140, 1931 Non Stop Trans-Atlantic Flight Harbor Grace - Copenhagen by Hillig and Hoiriis. airmail envelope with printed cachet franked with Newfoundland 15c Airmail cancelled by Harbor Grace Jun 24 31 cancel, backstamped St Johns Newfoundland June 26 and Kobenhavn 3.7.31, signed by pilot Holgar Hoiriis and navigator, German photographer, Otto Hillig, Very Fine