The older among us recognize the edge design certainly still - the good old stamp - okay, little joke - still there is the stamp yes...
This bowl shows very nicely the possibility of edge processing with a simple grinder - anyone can do that!
The sanding head described here in the instructions is no longer available, because the manufacturer has stopped the production of sanding heads in general - BUT that's not bad - because there is an even better alternative: The sanding heads from Techniglass for this application the RAPID.