It *is* a G1 from what I can see, that command gives me "BOX 300".. something along those lines. Wasn't very specific.
A BIOS update exists for ClearBOX 300 Gen1 which brings more features to expand memory and processor options. Essentially it transforms a Gen1 box to a Gen2 box. There is no update path from Gen1/2 to Gen3. Contact support for more information.
This seems like something that could help?
I previosly used http://ftp1.clearos.com/pub/ClearBOX/ to grab a BIOS there, I *think* I just used the R100E2 ROM. May need to give the other G1toG2 update a go instead.