While there is a JFIF file in the ROM at 2E6E80, it doesn't seem like it could be accessible without either opening up the Open Firmware prompt or hacking. It's unknown if there is still a way to make this image appear.Also present in the ROM are quite a few developer credits:
STM Version 2.2, Aaron Ludtke CTE Version 2.1
v2.1 Rules! Long Live M. Appleman, S. Williams, A. Ludtke
Software by Casey King, Hardware by James Lundblad and Mohammed Sriti
Sony. MFM Floppy Driver. (C) Jul-1997 Apple. By: Ben Koning. S Thanks: Buczek, Christensen, Parsons, Polic, Sheet, Wilkinson, Cronce, Eisenberg.
InterfaceLib - May 23, 1993.(Copyright Apple Computer, Inc. 1984-1993. Eric Traut & Sean Parent
680x0 Emulation written by Gary Davidian
Dynamic Recompilation by Eric Traut, tuned by Bob Abeles