Vintage early 1990's Berkeley ("Berk") Breathed's Opus 'N Bill Brain Screen Saver nonslip mouse pad featuring the Bloom County comic strip characters Opus the penguin and Bill The Cat. 

The mousepad was a promotion for a Delrina software Windows 3.1 screen saver program ("Opus 'N Bill Brain Saver") that was released in 1993.

 The mouse pad measures 9 1/2" x 8.5" x 1/4" (241mm x 216mm x 6mm).  Plastic mesh front with Opus and Bill artwork 'Delrina' logo, and dense black foam back.

The mousepad is in very good condition.  It has some yellowing due to age in the white areas and there are 5 small pinpoint sized marks on the lower right corner.  There is some light wear on the foam back (see photos).

The comic strip Bloom County by cartoonist Berkely Breathed ran in American newspapers from 1980-1989.