I have always admired the nice colours of Denver based travel club Ports of Call. The company was founded in 1966, and when this photo was taken they operated an interesting fleet of ten B707s and three rare Convair 990s. Although the 707s sometimes visited Amsterdam during the mid 1980s, their 990s unfortunately never did. In 1986 the company changed its name to Skyworld Airlines, but business was declining and they were forced to shut down in 1994.