Hi Group, In the "Pierce Piano Atlas 10th Edition" I find the following:

  "Claviola Co., Est. 1896 at New York City, Division of Kindler-Collins
   address 520W. 48th St."

  "Ronisch, Carl, Est. 1874 St. Petersburg."

  "Ronisch, Carl, est. 1845 in Dresden, Germany.  A new factory was
built in St. Petersburg before Carl died in 1893.  Carl's sons Albert
and Hermann took over the company.  Ronisch made pianos for Ludwig
Hupfeld before they joined forces in 1918.  About 1947 the name was
changed to Leipziger Pianofortefabrik.  For a short time the company
was also known as Deutsche Piano-Union Leipzig.  Present address
Bohlitz-Senefelder Strs. 18, D.D.R."

Serial number 46054 would fall between 1905 and 1910.  1905 starts
with 39000 and 1910 starts with 50800.  In this time period the serial
numbers are listed in five year blocks.

After typing all this I notice Colin's piano is spelled Roenisch, not
Ronisch, so this may be of no value.

Jack M. Conway, Los Angeles, California, USA

 [ All your typing work is valid and much appreciated, Jack, even
 [ if the spelling isn't the same in "Piano Atlas".  See the proper
 [ spelling at http://mmd.foxtail.com/Pictures/  One of the photos
 [ clearly shows the name on the cast iron piano frame.
 [
 [ The German letter following R is called o-umlaut; it's not the same
 [ as the plain letter o.  MMDigest cannot transmit the umlaut letters
 [ so I change them to their two-letter equivalents (ae, oe and ue) as
 [ authorized and encouraged by the orthography recently adopted in the
 [ four German-speaking lands of Europe.
 [
 [ Other oft-misspelled German family names with o-umlaut letters,
 [ seen in MMDigest using the two-letter equivalents, are Boesendorfer
 [ (pianos), Moeller (organs) and Loesche (orchestrions).
 [
 [ -- Robbie