I rather think that the record player pictured was called the non-sync.I the cinema this type of unit was used to play 78 r.p.m. records during the interval etc.The music played was not in sync with the film being shown,the film sound would,on this installation,be printed on the film in the form of an optical soundtrack.
compton
Location: North Wales Hospital (Denbigh Asylum) Gallery: The Castle and the Asylum