As one might already know, Japanese Game Boys came with manual marked with revision number. I ran into "Rev. 5" (http://i.ebayimg.com/00/s/OTYwWDEyODA=/$(KGrHqFHJDkE-NtEMEnkBPpT641BLw~~60_12.JPG) most of the time and only twice - into "Rev. 3" (http://i302.photobucket.com/albums/nn89/sktuemvie/ZEB12/DSC00395.jpg)
Does anyone know if there is any difference between consoles themself in a releases with different revisions and if it's real to find "Rev.1" (or whatever should be written on the manual of the very first revision like it was on April 1989)?