Fastest Drum printer

Last night got into a good old days conversion about printers. I'm trying to find out what was the fastest drum printer. My belief is it was a model made by Burroughs where in times long ago i had a great time, ah still can remember knowing the status of a job by the squeal of the 5500's power supplies, sorry i slipped into memory. If I remember there was a printer, that in 1975 was considered old, but it was either 1,100 or 1,400 LPM with at Uppercase drum. I also remember the printer controller being about the same size as the printer. Character registration sucked, but if all you wanted was a something that would get trashed, it sure was quick. If you wanted quality output there was a new chain/train printer that was as good if not better then the 1403. Anyone can help ? -pete