well, the square logo a`s are the most common... You should check whether you have the motherboard version 5 or 6. The rev5 is more rare than 6, which is most popular design. The real rar a500s were thore who had square logo ENGRAVED instead of sticked to the case, these were mostly pre-rev 5 dated 1987-half 1988. All of they have kickstart 1.2! I have one of them... You can check trevision by looking at the motherboard under the floppy drive.
