That's right:
When it comes to frame "11", you have to move the auxiliary wheel to the "1" position. The counter will start from "1". When display "11" on the counter again, move the auxiliary wheel to the "2" position. Returning to get back to "11", turn the auxiliary wheel to the "3" position.
Combining the number of the auxiliary wheel (0, 1, 2 or 3), with the number of the counter window (1 to 11), is well known frame number.
View attachment 83711,
In the picture you can see a series of rollers: one external, of black color, which spin when used 120mm film, by activating gears for that film size.
The inner rolls (brown) are driving the corresponding gears to 35mm film format.
Regards.
PS: Sorry for the translation.