Vickers Viking G-EAOV, prototype Published on December 17, 2013 in Captain Sir John William Alcock, K.B.E., D.S.C. (5 November 1892 – 18 December 1919)Full resolution (452 × 199) ← Previous Next → Vickers Viking G-EAOV. This is the prototype flown by Sir John Alcock, 18 December 1919. (Vickers PLC)