>The problem is that we have started to divide the machines into three
>groups, OF 1, OF2, and OF 3.

/openprom node shows the OF version.  My G4 looks

Apple PowerMac3,1 1.3f1 BootROM built on 10/28/99 at 18:10:16
Copyright 1994-1999 Apple Computer, Inc.
All Rights Reserved.

Welcome to Open Firmware.
To continue booting, type "mac-boot" and press return.
To shut down, type "shut-down" and press return.

 ok
0 > dev /openprom  ok
0 > .properties 
name                    openprom
device_type             BootROM
model                   OpenFirmware 3
relative-addressing     
supports-bootinfo       

 ok
0 >