Randy Wesner submitted this gem as his favorite insulator. It's a CD 134 Pennycuick, wide groove, signal with a continuous drip. That's a rounded projection that goes all the way around the base, and can be clearly observed in the photo above. Pennycuick's are known for their well formed threads. But that's about all that's well formed on this specimen. The dome is tweaked to one side, making the wire groove uneven. The glass is also clouded with milky swirls. Randy obtained this favorite on eBay.