Bigdan, when did you last buy a kickstart rom set?
Thinking about it, I have seen that picture before but I seem to have forgotten all about it.. All the 3.1 ROMs I've ever had were EPROMs with varying kinds of stickers on top of them.
Actually one set I have is burned to PLCC proms with a personality module and a sticker with ESCOM copyrights:
http://jope.fi/ks31pm.jpghttp://jope.fi/ks31rev.jpgSorry for the blurry shots, that's just about the best the Canon A520's macro mode can do this close.
Unfortunately this set no longer works. As you can see, there are exposed pins on the back of the casing and they shorted against my RBM Tower case one time.. The Roms are 99% working, but a few bits have changed.
I have also had sets like this, which are indeed EPROMS with a full length sticker on top:
http://www.vesalia.de/thumbs/kickstart-1-thumb.jpgVesalia's details page no longer shows chips like that, but instead they have the MX Mask Roms.
Another set like that:
http://www.planetmulti.de/v2/pic/A4000_Motherboard_big.jpgSo.. Some have more professional looking stickers and some are just dot matrix printed to Avery sticker sheets. If you want to have a 100% legal kickstart, who do you trust?