Horn made with the slides in the wrong places

One question that comes in periodically is about a type of double horn that seems to have been constructed to have the valve slides in the wrong places. I first ran into one of these back when I was in high school and indeed they do look a little odd. The first one I saw was an old Sansone, but you are just as likely to run into an old Holton, their “pre-Farkas” model. For example this instrument, the photo being linked from the very interesting...

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