The Breitling Chronomat manual and some links

My dad (Niel Jonas) wearing his Breitling Chronomat in the army.

The Breitling Chronomat is unique for the circular slide rule.
Mine is a bit scratched so here's a nicer photo from Chronomat history
as well as this delightfully enthusiastic description:

The Breitling Chronomat with its rotating slide-rule was patented in 1941
as war raged through Europe and other parts of the world,
its design offering a welcome respite from the plethora of military and military-inspired watches of the period.
The Chronomat's emphasis on engineering and mathematics, science and industry
seemed to offer hope for a future when the war would be over and reconstruction could begin.
To summarize the manual for the 'Type 42' circular slide-rule: The Navitimer's 'Type 52' slide-rule is different

Differences in the slide rules: Since the stop watch's second hand extends all the way to the slide rule,
I figure there's got to be some method of setting the outer ring
so the second hand acts like the cursor of a circular slide rule to point directly to some calculation.
Does anyone have directions for that?

Here's the manual for the Breitling Chronomat sliderule:

other links: