hanksjim1 Posted December 6, 2019 Share Posted December 6, 2019 (edited) According to the "KLIPSCH HERITAGE REFERENCE DATA - (V.3 - 23 Aug 2013)" found here on the forum: "July 29, 1955 was the last day for the four digit serials (i.e. 1811). After that the "number- letter-serial" system went into effect (2 August 1955). The first "number-letter-serial" speaker was produced on the 2nd of August 1955; that serial number was 1A812." Despite this I continue to see documented Klipschorns delivered after that date with four letter serial numbers (including my #1251 manufactured in 1957 and the subject of the last thread; #1751 delivered March 29, 1963 ) Maybe just the singles (both xx51...curious...) continued with the 4 digit serial numbers? When was the last four digit khorn built? Any thoughts? Edited December 7, 2019 by hanksjim1 change #1251 "delivered" to "manufactured" for clarity Quote Link to comment Share on other sites More sharing options...
boom3 Posted December 7, 2019 Share Posted December 7, 2019 "Delivered after that date" I think is the key phrase. The four digit units were probably existing unsold stock in the distribution pipeline. Quote Link to comment Share on other sites More sharing options...
hanksjim1 Posted December 7, 2019 Author Share Posted December 7, 2019 Nope...#1251 labels show 1957...even has 1957 date with signature in pencil inside bass bin... Quote Link to comment Share on other sites More sharing options...
boom3 Posted December 7, 2019 Share Posted December 7, 2019 well,so much for that theory! 😉 Quote Link to comment Share on other sites More sharing options...
JRH Posted December 10, 2019 Share Posted December 10, 2019 Boom3 got part of it right! Sequential serial numbers did not necessarily ship sequentially, due to some units likely being put on the back burner for the rush orders. I'd like to see the document referenced as "KLIPSCH HERITAGE REFERENCE DATA - (V.3 - 23 Aug 2013)". I hope to Hell I did not generate it! The 1955 timeframe should be 1963, and not necessarily those specific days. It is true that #1811 was followed NUMERICALLY by 1A812. And by the way, #1700 shipped a week after 1A812! Quote Link to comment Share on other sites More sharing options...
hanksjim1 Posted December 10, 2019 Author Share Posted December 10, 2019 Thanks for the clarification Jim!... It is great to get some more definitive data for the record. To be clear, can you confirm that the alpha numbers (like 1A812) started in 1963 (not 1955)? I am attaching the document in question. KHorn Serial numbers.pdf 1 Quote Link to comment Share on other sites More sharing options...
JRH Posted December 11, 2019 Share Posted December 11, 2019 The letter-codes began in 1963 with "A". Heresy's and Cornwall's were so new that the SN's took a four character format. Specifically 6A03 and 3A09 respectively. Interestingly the 6A03 Heresy follows 603, while the 3A09 Cornwall follows 308. Wild times in the logbooks! 1 Quote Link to comment Share on other sites More sharing options...
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