Here is the About This Computer window on a PowerBook G3 Series computer.
Figure 1 About This Computer window
Figure 1 About This Computer window
It shows that the unit ships with Mac OS 8.1 running the PB G3 Series Enabler 1.0
Note: Macintosh PowerBook G3 Series computers should not be confused with Macintosh PowerBook G3 computers. Though the names are similar, there are significant differences. For more information differentiating between the computers, read article 24604: "PowerBook G3, G3 Series: Identifying Different Versions"