573 to 578 rebuilt

573 to 578
PC-78-D

78 foot 3.5 inch seats 34 573 Athabaska 574 Caribou 575 Muskoka 576 Ontario 577 Lake Couchiching 578 Lake Mackamic Electro Mechanical Air Conditioning in1968

Drawings October 1952 January 1968 November 1974

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