I found this in the 'London Evening Standard' dated 22nd September 1915:
“Teacher (Solomon), trading as Teachers, (described in the receiving order as Solomon Teacher) of 474, Kingsland Road, and lately residing and carrying on business at 474, Kingsland Road, as a gramophone dealer and jeweller.”
… also this piece dated 20th December 1928:
“Mr. Solomon Teacher, gramophone dealer of Kingsland Road”
“Teacher (Solomon), trading as Teachers, (described in the receiving order as Solomon Teacher) of 474, Kingsland Road, and lately residing and carrying on business at 474, Kingsland Road, as a gramophone dealer and jeweller.”
… also this piece dated 20th December 1928:
“Mr. Solomon Teacher, gramophone dealer of Kingsland Road”