1961 - the year my dad finished his final flying tour, as 2i/c of the Transport Command Examining Unit at RAF Benson. I shall be sending him the linky - he still enjoys Silver Surfing t'interweb at 96 (even if he will have to turn the sound way past 11 - years of flying the North Star on exchange with the RCAF did for his hearing. Something to do with the propellers being exactly in line with the cockpit, he thinks).