Ha! My luck just gets better with this thing....I actually have one 6-50276-06 hopper already installed...I wasn't using it until I saw your pic. The standard hopper would do maybe 2-3 vends before finally getting a token jammed and then eventually causing the machine to cycle through each hopper before faulting (my fault light doesn't work because I'm missing a bulb).
The machine was really clean by all standards. When I got to the skating rink, the owner was cleaning it up for me. He had three to sell and two were spoken for already from someone who promised to be there in 4 hours. I shouldn't be surprised it was in good working condition as he was using all three Rowe BC25's (it's a roller skating rink) up until this week. He had three newer Rowe change machines in stock ready to replace them. It's hard enough finding one of these in good condition, let alone working, let alone a descent price, and yet let alone within a reasonable driving distance (20 minutes). It's got some wear on the outside, but I'm not complaining. I like the fact that it looks used.
The owner acted kind of surprised when I told him it was for my "home" game room (and not a laundry mat). His eyebrows kind of went up when I told him I was gonna configure the reject button for free play. I told him it has been a always dream of mine to add one of these "poop-colored" machines to my collection and he smiled. He was gonna give me the blue/white one up until I told him that. I'd assumed all three available machines were brown up to that point. One man's trash becomes another man's treasure.
When I originally phoned the owner about my interest in the machine, he told me the only thing wrong with it was that it had a bad kit in it. The other interested fella would be there in four hours, so he told me if I wanted to see that it works, he would quick (temporarily) swap a kit from one of the working machines into the one he had intended for me. He offered to knock another $50 off the agreed upon $190. I hung up to think about it.
I almost gave up because a new kit is at least $180. I wasn't trying to be too picky about the price, but I had to decide if the hassle was worth it. I called him back when my transportation arrangements came through and he tells me he was mistaken...all three kits work!....under local consultation, he just didn't have the one in question plugged in properly. If my friend with the minivan hadn't called me to say "let's go get it" I would've been out of luck today. Ha!
Anyways.....I swapped the 6-50276-06 hopper with the standard hopper and it vends perfectly every time now. As stupid as it sounds, the BOLD red writing on the outside of the hopper should've been a clue I suppose. In my defense, I didn't bother to try it because I thought I was looking for a hopper that said, "large coin hopper".

I have a hopper (in the middle) that isn't labelled except with tape from from the previous owner. I have no idea what size token that will take.
Is there really a difference between the 6-50276-06 and the 6-50276-07 hoppers?