As I remember you were pretty savvy about olde-tyme photography.
Cleaning 40+ years of crap out of my office I found an actual, brown bakelite, "Brownie" box camera. Shutter sounds like maybe 1/60th.
The spool looks like 620 - which was very popular back in the day for those kinds of cams.
Back then, Verichrome Pan was THE film for cheap cameras. It was a sort of "double-emulsion" construct combining some "fast" grains with "slow" grains. It was almost impossible to take a badly-exposed pic using that. In better cameras it produced almost "magical" results - a slivery rendition where you could see things both in bright sun AND deep shade without any obvious demarcation. I liked VP. Great for everything, but almost 'artistic' for landscapes. Kinda duplicated how the human eye sees things.
In modern electronic systems, it'd be called "Extended Exposure Range". Non-'linear', but aesthetic maybe because of that. Eyeballs aren't "linear".
Anyway, with totally fixed arp/speed, a wide-latitude film WOULD be required for decent results.
Chromogenic ???
More of a pain-in-the-ass though ...
There's also the 620 issue ... they don't sell that anymore. It's still 70mm, same as 120, but the spool is slightly different, thinner edges. And, of course, paper backing for 6x6.
Hmm ... could stuff a H-Blad sensor in there, make a $5000 "Brownie" :-)