This is the original revision B logic board for the Bondi Blue 233MHz iMac G3. The main difference between the rev.A and rev. B boards was the ATI graphics chip and amount of VRAM. The rev.A model has the ATI Rage IIc graphics and 2 MB of VRAM (although the was upgradeable to 6MB via the VRAM slot) and the rev.B has the more powerful ATI Rage Pro Turbo graphics with 6 MB of VRAM.
NOTE: This does NOT include the CPU and RAM board which is a plug in module available separately.