Reformed Brocken - meaning reformed pieces, or chunks, etc. This is a manmade synthetic stone formed from, possibly, bits of natural stones. In this case, it seems to be made from, possibly, Coticule bits. It could also be a purely synthetic stone. The smell of the tan side is like a Coticule. I have not tested it, reports tell me they are not great to use.
JGES was a continuation of the company known for selling Escher hones; beginning in the 1920s, they continued into the 1950s.
