If all parts are original, that is very close to the same length (very slightly shorter) as the high pitch Lafayette Eb that I am currently working on. Not all high pitch clarinets are marked HP. It seems that in some cases, LP was the exception to the rule and thus the LP clarinets are usually marked. HP is what I assume on that era instrument unless marked otherwise or unless the dimensions match a known LP clarinet. With the C clarinets I have found slight differences in the lengths of the LP models that do not exceed the differences I have found in Bb LP clarinets. There can be other dimensional differences or variables particularly in what is considered "HP". The HP pitch standard was not as consistent as the LP standard, apparently.
This lends further support that HP instruments should not be considered obsolete, but should be used with instruments that can be tuned to match whatever the HP standard was for those instruments. This JTL you have can be easily used as an "E" clarinet and will be easier to play with guitars and other C instruments than an Eb clarinet. We are musicians. Transposing and tuning by ear should not be an impediment.
