Lynn, thanks for that. Sounds like the pertinent documents that are hopefully still out there have yet to be unearthed - I was hoping otherwise, hence this thread.
One interesting anecdote I came across regarding US olive drab was that for a period it was brown in shade. This occurred when access to linseed oil from the far east was halted, thus the formula did without or some other ingredient was added, resulting in a brown drab that lasted for two years or so - exact dates not known. See the post by GeorgEyerman here:
https://www.tapatalk.com/groups/miss...nseed#p1371878
regards,
Jack