I don't remember where I picked this thing up, just another average B 145 lying around, but with a growth of glass protruding out of the side. it used to be bigger but some of it got chipped off

Update: This is known as a "lehr kiss" Where the insulator next to it in the cooling lehr was too hot, and slumped over and "kissed" this one, where they became fused. When they were found, they were broken apart, and if still usable, sent on to shipping. (Thanks to David Dahle for the info)