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O P U S N U M B E R L I S T

 

This list of opus (serial) numbers is starting with 1832, the year when Johann Michael Schweighofer started his own piano company. His father, Michael Schweighofer, was not numbering his instruments, but his oldest known piano is dated 1792. The numbers refer to the beginning of the respective year. Estimated accuracy +/- 1 year. 

The serial number should be interpreted as "not older than year ...".

Column A contains serial numbers graciously provided by Alexander Langer, who owns a piano dealership, in Klagenfurt (Austria) www.klavierhaus-langer.at. He can be contacted for information at alexander@klavierhaus-langer.at

Column B contains dates & serial numbers from known cases.

AB

If you don't know what the serial number is or where it is located on you piano, read this page: Where is the serial number?

If you can provide more information (for instance, if you own a piano whose serial number and manufacturing date are certain), please send an email with the facts. Your help would be appreciated.

NumberYear   NumberYear 
1 ?1832   
3001841  
3501842   
4001843   
4501844   
5001845   
5501846   
6001847   
10001852   
14001856   
20001860   
28001865   
   3326   1867+
36401870   
45001875   
55601880   
66201885   
76801890   
87401895   
98001900   
128501925   
  129381925
129701926   
  129731926
131001927   
132301928   
  132641928
    
133601929   
  133701929
  134531930
134901930  

Dates when some actual pianos were sold. The manufacturing date could be approx. 1 year earlier.

NumberYear
12938October1925*
12973July 1926*
13264May 1928*
13337November 1928*
13370September 1929*
1345317 January 1930

*Source: Alexander Langer

Dates from the Pierce Piano Atlas. Year corresponds to the respective number or higher, but the data is not reliable and is provided just for information. 

NumberYear
80001880
83501885
87001890
88001895
90001900
95001903
10150 1904
104001905
108001910
109501915
110001920
118381924

Updated: 19.05.2011

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