Thanks for the help of people on EAB, I’ve managed to locate my system info on WB3.1. Wanted to upgrade to OS4 but unsure if my hardware meets the requirements.
The A1200 has got 3.1 Roms and has a memory expansion of 4MB but I'm unsure that it's the same thing as the PPC Accelerator card, which I hear is needed.
Have enclosed the photos of the system info. If anyone can recognise it as being sufficient, I’d appreciate being told.