It's made by a somewhat unknown company called first components (Taiwan based I believe). There are not many companies that make eccentric BB's for threaded shells, and this is the only one I know for a T47 shell.

I said in a previous post that its eccentricity was irrelevant. What I meant is that the point of my original question was simply to understand the general principle behind the reasoning of reverse threading for bottom brackets since it seems counter intuitive.

However the fact that it's eccentric could have contributed to my specific issue of it coming loose.
Maybe I just didn't tighten it properly in the first place, but it's also possible that the clocking of the eccentric cup has an effect on it. If you were to draw an imaginary vertical line that splits the BB in half, the spindle is currently positioned in front of that. I suspect that when I'm mashing and apply downward forces on the pedals the position of the spindle might want to unthread the cup. I put some Teflon tape on the thread and tighten the cup as much as possible, but if it loosens again I might want to try a slightly different gear/chain length combo so that I can clock that spindle behind that line.
The tool I would need to tighten it (and torque it), other than the manufacturer provided spanner wrench, is a 64mm socket. Not very common and very expensive if I can even find it.
Anyway a picture says a 1000 words