It reminds me more of a two-stage
cycloidal gearbox, though without the pegs and oversize holes in order to minimize the wobble - the wobble is just left there.
This could probably be driven by a belt or chain that was actively tensioned or some sort of CV joint. Either way, I would attempt to minimize the mass of that wobbling inner gear.
The 11M:1 gearbox is interesting, as well. The output torque is obviously limited by the strength of the material, implying that the efficiency is going to be exceptionally small. To put that gearing in perspective: to get a single revolution per day from the output, you'd need to drive it at 7898 rpm.