American company Beseler (most famous for building darkroom enlargers) imported Japanese Topcon cameras during their heyday in the 1960s and co-branded them as a result. I don't know when they quit, but I know my Topcon RE 200 does not carry the Beseler name.
Anyone who reads my Canon pages probably knows all about badging in different markets. Topcon did it too: this model was the Uni in Japan and the Hanimex Topcon RE Super (probably in Europe).
The good stuff: this is one of the first cameras with auto exposure capability and full-diaphram through-the-lens metering. It's quite a nice camera.
The bad stuff: it's got a poorly-regarded leaf shutter instead of a focal-plane, and the leaf shutter is notorious for being difficult to work on. If I recall (but I can't remember where I read it), it was hard to find repairmen who would do it even when the camera was new.
I'm fortunate: my shutter works, though I can't really test it without running a roll of film through it.
Camera-wiki: Topcon Uni
Lomography: Topcon Uni