I really wouldn't know.
The ATX ocular module has HA---A, the EL10x42 KD---A and the EL8x32 has FD---A.
I'll ask around, but I'm sure our friend Down Under will have all the answers soon.
Effective september 1 2020 the ## are starting with 10.
Just add 10 to get to the year of production.
So today an EL 10x42 with ## KD1010130A came in and AFAIK (and been told) just the two first digits count.