Steve,
To make short ... ask JCM!
And I think that Michael is very close when he is writing "
This "darkgreen", formerly known as RLM 83, is nothing more, nothing less than a darkgreen variation of RLM 81."
It looks like a long shot without end and there will be "blood and tears" to come; this is the only point you can be sure until next "discovery".
Last just a question to answer to yours: Why RLM 83 chips in B&V factory archiv????
Regards, Franck.
PS: Sorry I forgot one point: You can go on LEMB forum too where the same subject has been discussed in a more "blood & tears" way. But, who knows, this thread is not finished yet 