In addition to their main piano business Boyd also had a sideline in theatre box office ticket sales. Perhaps this relates in some way to them supplying pianos to theatres and this being a natural bolt on service they could offer to the theatres and the public?
When I saw the phrase “Box office for all theatres”, I thought it was mid-century adspeak meaning that theatre owners could pack in the punters if they have a piano; but maybe that turn of phrase was too American to make sense to the English.
There’s another, less elaborate wall advertisement for a piano store in Willesden Green. This became the inspiration for my composition St Paul’s Pianos.
Sam Roberts, 17 January 2012:
You might be interested in this blog post which features another Hackney piano sign and also some news about potential protection for these Ghostsigns: http://www.ghostsigns.co.uk/2011/10/love-local-landmarks-and-hackney.html
Ben.H, 17 January 2012:
Thanks!