727-100's were former NE (Northeast) yellow birds. They only flew on for a couple of years, and were retired when a new batch of 727-200's arrived.
Trivia - NE flew the 727-100's on the MIA LAX
route awarded to them in 1971. DL
/NE merger was conditional that the MIA LAX
route was not included in the deal, as DL
had SFO MIA
DC-8-61 nonstop service then.
aquired more 727-200's in the 1987 WA
(Western) merger, one of the smoothest mergers in airline history, as both airlines employees embraced the marriage of the two quality carriers. "The only way to fly, ready when you are"