Lot 621, Canada 1932 6c on 5c brown olive Airmail surcharge NH block of six, swollen breast variety, sold for C$316 July 24, 2020November 4, 2018 by Sparks Auctions Lot 621 Canada #C3i 1932 6c on 5c brown olive Air Mail Surcharge, a mint never hinged plate 2 upper right block of six with the “swollen breast” variety on the top right stamp. Fine. Unitrade CV$262, sold for C$275.00 plus 15% buyer’s premium.