Mine lacks the sticker, and as I said, contains a "good" ROM.

Back in 2002, I was doing work experience at a local AASP, and we had a Power Mac 6200 (basically the same machine as the Performa 6200, sold through different dealers from memory) come in that needed a power supply replacement, and the owner also wanted OS 8.1 installed. The machine got given to me to work on, and I remember running the 5xxx/6xxx tester and discovering that the machine had a faulty ROM, and the OS 8 installer wouldn't work on it because of the faulty ROM from memory.