It says Arthur Bishop & Co, Harringay, London.
Does anyone know the history of this company as I am really curious!
Being a common surname, it is not surprising that there have been a number of piano firms with the name Bishop, and we have no reason to assume that there is any family connection between them.
BISHOP (Arthur T.) London
Seems to have been connected in some way with Joseph Bishop, and sold Joseph's pianos, but we have no evidence that Arthur really made pianos.
1899 Not listed.
1911 Kelly’s Directory lists Arthur Bishop & Co., 521, Green Lanes, Finsbury Park.
1914 Music Trades Directory lists A. Bishop, 521 Green Lanes, Finsbury Park pianos, music.
1928 Not listed in Musique Adresses Universel.
John Markham, who used to be one of my bosses at Berry Pianos, told me that Berrys took over this firm before the 1939 war.
If you could send photos to show the whole piano, I may be able to tell you more, but it is likely that it is Edwardian, so have a look at