Bandera is that set up as a 1 X
It's a hybrid drivetrain: 1956 alloy shell AW IGH w/ '50's Cyclo 3cog shifted by derail and a single 1/8" chainring.
It gives 9 ratios from 41-106GI with useful steps and the ability to shift while stopped or braking.
All of the disadvantages of both the IGH and the derailleur while adding additional complexity and mysterious shift patterns, very British.
-Bandera