I know they did have Beseler Topcons at one time. Topcon ran ads in Pop Photo advertising as such.
In the late 70's when I was in the Naval Reserve, we went to Memphis NAS, for firefighting training. I was taking photos for our activities, and I used their lab to get our film and slides developed. The tech on duty showed me a box of parts from a shattered Topcon. Seems a Photographer's Mate was taking some overheads of the runway, and accidently dropped a motor-driven Super D from 4000 feet (Guess he forgot to tether the camera). The only recognizable parts were the film door, and the focus ring from the lens. They had to walk the runway to insure no parts were left to be sucked into a jet intake.