Guild D4-12 I polished by hand because I really didn't care for the dull finish, with Crock.
Crocks are dangerous as H on slippery surfaces, life threatening. After avoiding slipping and falling on ice and snow all winter, I finally went down - hard - this spring on wet grass just three paces from the front door.
I just bought these yesterday - much more comfortable and safer than Crocks - to replace the ones I've had for 15 years. They were ready for a "good throwing away" 5 years ago but I still wear them, cracked, ripped up, glued together... They seem to be getting hard to find now, hopefully not being discontinued/going out of business.