Chris that is a great analysis.
It sure would require specialty picks?
I have seen some Institutional Locksmiths
with a series of picks made for their specific site locks.
If someone interacted on a daily basis with this type of lock
then some insights may be discovered ?
A Try-out set would most likele be made of original keys
fitted to the in between code cuts.
It is fascinating to think about.
The Black Museum at Scotland Yard has displys of Burglary Tools.
Quite innovative too.
Brian…………………………….