Originally Posted by WHBM

I had forgotten that on the web there is a complete Delta timetable for March 1 1973, just two months after we are reviewing here, which includes the page at the back where Delta gave a cross-reference of aircraft types by flight, including specifying the difference between the 727-100 and the 727-200. Someone in the Atlanta office must have been a plane buff !

http://www.departedflights.com/DL030173p86.html

Furthermore the flight numbers are all grouped into blocks by aircraft type, as you can see looking at the page. 727s are 200-299, and 1200-1299. A second buff, this time in Ops !

Only four of the new Delta 727-200s had been delivered by the time of this schedule, so the bulk of them are the old Northeast fleet. You can see that, while many of them remain on the inherited Northeast routes, quite a number had started to invade Delta territory.

Following the links on the page will take you to scans of the individual pages.