139 to Western Airlines on May 13th, 1960. It was then sold in  1964 to Pan Am, which operated it for several years before leasing  it to several other carriers, including: Aer Lingus, British Cal.,  El Al, and many others. It was the 108th 707 off the line, with  serial number 17903. In 1979, British Caledonian leased it when the  DC