All are slide type carburetors. I got them in a lot with some other things. The two upper ones are the same, of course, just reversed re: left/right. The black one that resembles a Perry has a logo that looks like "Picco" (see photo), but it doesn't look like any of the carbs currently on Picco engines. The other 2 are familiar, I just can't put my finger on it. At this point, I think my memory crashes more than my aircraft... and that's a lot!

I'm selling off my r/c stuff, and it helps to know what it is. :-)