Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,407 pages of information and 233,521 images on early companies, their products and the people who designed and built them.
of Apollo House, 4 Bunhill Row, London, EC1. (1922)
of 4, 5 and 129 Bunhill Row, London, EC1. Telephone: Clerkenwell 4712. Cables: "Discobolus". (1929)
1918 Patent - Improvements in or relating to Talking Machines. 
1922 British Industries Fair Advert for 'Apollo'; Gramophones. Also manufacturers of Parts and Accessories. (Stand No. B.20) 
1929 British Industries Fair Advert for 'Apollo' Gramophones. Also manufacturers of Portable, Table Grand, Pedestal and Console Gramophones. Special features, Patent Deep Tone Resonator. "First class workmanship and finish, magnificent tone and moderate price." (Musical Section - Stand No. MM.6)