Author: ndfay
Date: 2018-03-29 16:01
It may have been patented or standardized in 1914, but it was very clearly in common use before then. I've found dozens of horns that pre-date by almost two decades, and it doesn't seem likely to me that they were all stamped by the owners 20 years later using the same font in the same location. And none appear to be hand-engraved, which I think we would see if people were trying to label the horn they bought in 1895 to match a standard that came out in 1915.
It does make sense that importers or other entities stamped horns prior to re-sale. We know for certain that Fischer, Bettoney and other importers added their stamps post production. But again, there is such a gap between 1887 and 1914, and I doubt importers were waiting 30 years to sell the instruments, or recalling them from the owners to stamp them.
It does make sense that "HP" and "LP" were in common use in the mid-19th century. Even if their exact meanings were not standardized, there was a huge incentive for manufacturers to mark their instruments with some kind of general designation for use in the already-varied pitch markets of the time.
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