Precisely. If it fit into this type of numbering system
I would have a much better chance of knowing what to look for.
I have a couple.
But the CBM numbers are super handy in drilling down to the specifics.
We know that the 318069-16 is PAL only. And 318069-17 is NTSC only. Both of those are ECS with 1MB Chip.
Also, the 318069-11 8375 is 2MB chip, NTSC.
8372B 318069-03 is 2MB NTSC/PAL.
8372A 318069-02 is 1MB NTSC/PAL.
It would be nice to know which Agnus number we're talking about here.