All Rigore is suspected to be a tradename used by the Dutch/Frysian dealer Grubo from Leeuwarden. If wo, they were a dealer of musical instruments and repair shop. It is unknown if they made their own instruments as well, although they did call themselves Noord-Nederlandsche Muziek Instrumenten Fabriek (Northern Netherlands Music Instrument Factory), as well as Muziek Industrie (Music Industry) and Muziek Import (Music Import).
They almost nearly went bankrupt in 1940 but did continue on during and after WW2.
Some of their instruments are clearly Belgian made. Some have the Al Rigore logo with Pelisson Guinod Blanchon engraved, so they did sell stencils.
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