I've just purchased a six foot grand piano and would like to know the age. The piano is a Winkelman Braunschweig serial number 10836, with mark to say sold by J Muir Wood & Co Glasgow. From what I can work out the piano was probably manufactured between 1896 and 1897, it would be great if someone was able to confirm for me. Interesting piece of history the piano was once owned by Andy Stewart, the gentleman who composed Donald Where's Yer Troosers?
The number certainly suggests 1896. J.Muir Wood had died in 1892, but his long-established company name continued for some years. Zeitter took over Winkelmann, and they became Zeitter & Winkelmann, but there was a considerable overlap period. There is some debate about whether their numbers can be applied to Winkelmann pianos, but they often seem near to the truth.
Your best hope is to ask your tuner to inspect the action (the working parts of the notes) to see if it is marked with the action makers' name and number, and I may be able to date this.
Harry Lauder preferred German pianos too. I'd like to say I miss Andy Stewart's hogmanay, but...
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If you find old references or links on this site to pianogen.org, they should refer to pianohistory.info