treewind:"Wheatstone and Lachenal Dates of Manufacture" concertina.info/tina.faq/conc-ap1.htm RE:If you check the origin of that article you will find that the true serial numbers do not start with "number 1" at all. As a matter of fact the first hundred or so products are quite a bit obscure but some precise information is available too. You find copies of the original Wheatstone books here: http://www.horniman.info/WNCMARC/C104A/INDEX.HTM and you will find that the first (interpreted) entry is 03 May 1834. Further research can date the earliest "known" instrument (not named a "Concertina" but a "Symphonium with bellows) a couple of years back, but not to 1830 ( from my memory,I can check better later)
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