sentences:  During that time, BCal placed an order with the British Aircraft Corporation (BAC) for two new One-Eleven 500s and acquired additional second-hand examples.At the same time, the airline disposed of some of its 707s, VC10s and One-Eleven 200s.These included the original pair of 399C series 707 aircraft that had been delivered to Caledonian Airways direct from the manufacturer in 1967/68.