St. Margaret's Music Cabinet

I found this advert in the 'Forest Hill & Sydenham Examiner' dated 21st February 1930: “ST. MARGARET'S MUSIC CABINET. District Agent for His Master's Voice and Columbia Gramophones and Records. The Largest Stock of Gramophones, Records, and Music in the District. Minimum Stock - 15,000 RECORDS. Address - 14, EMPIRE PARADE, SYDENHAM ROAD, S.E.26.”