Both USAir and the original Piedmont ordered the 737-300 and -400 with analog instruments. All of those airplanes have dual MCDUs. The fleet totaled well over 125 at one time. Some have been parked in the last two years and more will be on the market in the coming years as the older ones are 15 years old or more. In the United States the 737 type rating covers all models although USAirways flew the 737-200 fleet as a separate bid.
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