Historic Photo: Frontier Airlines (1st) Convair 580 N73163 (msn 366) DAL (Bruce Drum). Image: 105571.

Frontier Airlines (1st) Convair 580 N73163 (msn 366) DAL (Bruce Drum). Image: 105571.

Copyright Photo: Frontier Airlines (1st) Convair 580 N73163 (msn 366) DAL (Bruce Drum). Image: 105571.