What you've shown in your original post is a stepper with a Single-Step Reset which means that when it's working properly the reset solenoid takes the gear just one step back, similar to a credit/replay unit for example. If you look at the Full-Reset steppers in the parts catalog you'll see that they don't have the flat Escapement pawl you refer to. Does your stepper successfully take one step back?

Either way there is a disconnect here somewhere. Either that stepper is intended to step back only one step at a time, or somehow an Escapement pawl was incorrectly added to the stepper at some point.

/Mark

Given that the only reset pulse for the stepper comes at the start of a new game I think the stepper should have a full reset instead of a single step reset. Here are the relevant pages from the 1965 parts catalog with the escapement pawl shown in red.
Bally 1965 catalog steppers (resized).jpg
I think the escapement pawl might be removable which would convert it from a single step reset to a full reset stepper. It's worth a shot anyway. Just take lots of photos before disassembly if you're unsure.

Hmm. The plot thickens. Elsewhere in the catalog it does say Grand Tour uses a single step reset stepper:
Bally 1965 catalog stepper parts (resized).jpg
I'd like to understand how that works as far as the rules are concerned.
Either way you'll need to adjust the stepper so that it does take a reset step.