I wonder if this is an ‘anti-skunk’ measure or forms part of the newer tanning process that has been mentioned, which I believe is more environmentally sustainable and was required by regulations.
If I understood some of the speculation in this thread, I think it was this change in tanning procedures that resulted in #skunkgate (as it would surely be dubbed today!).
Interesting.. do you know when the new tanning procedures started?
The skunk leather noted here seemed to have been predominantly from years Q and R, so presumably a different tanning process was begun then. And then possibly abandoned for another process

