B&W G3; which rev?

From Low End Mac:

The Rev. 2 b&w G3 uses a different motherboard, has an additional drive bracket, incorporates a new IDE controller chip (marked 402), and includes a faster version of the ATI Rage 128 video card. 350 MHz and 400 MHz models may have either motherboard; 450 MHz and faster versions always have the Rev. 2 board from the factory. The new IDE controller improves slave drive support and solves a drive corruption problem.

When buying a blue & white G3, insist on getting a Revision 2 system. The best way to make sure you're getting a Rev. 2 motherboard is the"402" marking on the CMD646 IDE controller chip. See Accelerate Your Mac! for more details on differences between these motherboard revisions.

If it was made in Aug. 99' your pretty safe in assuming its a REV 2. One easy way to tell is if you can stack the HD's in it. If you can, then its a REV 2