Oddly enough, almost an identical picture, although from the other side, is in "Wonders of World Aviation", a book from the late thirties. The tanker in this case is G-EBMR, another W10. The book also gives the endurance record of 420 hours, set in 1929 in a Ryan Brougham. Forty-eight tanker contracts. Has this record ever been beaten, and why would anyone want to do it?