This pottery operated from 1944 - 99 in Rønne, on the Danish island of Bornholm in the Baltic sea. It was started by Johannes M Pedersen and Gustav Ottesen. Johannes had previously worked at the Hjorth pottery.
There are some interesting photos and information in Rønnes town archive (in Danish) if you follow this link.
https://www.roennebyarkiv.com/johgus.html. The image on the right is of a popular range called Ratonga.