They were likely contracted out and physically constructed by established British builders such as George Houghton & Sons (GH&S) or Windsor.
Very Rare 1920s Telesforo Julve Classical Guitar Salvador Ibanez Stunning
very very rare vintage arp little brother synthesizer expander
LAVA ME 2 36”Very Good Condition with Original Case , Orange Very Rare
RARE 1862-1880 J. Higham , Prize Medal ,Cornet Instrument VERY RARE
Very Rare Stone & Company Salt Lake City Master Model Trombone LDS Church
MXR vintage belt buckle - very rare, brass, 1970's