J. & J. Hopkinson

[Gill the Piano]

1899, according to Pirce's Piano Atlas, but I know Bill has more detailed records!

[Bill Kibby]

Unfortunately, Paterson & Sons used that name from at least 1851 into the 1900s, so that doesn't help. Are there any exhibition medal dates on the piano? Otherwise, try
http://www.uk-piano.org/piano-gen/datem ... ianos.html

... Or look at the Reports page there, and the Numbers page.