Hi @SteveBaker, This week I passed the tuning chart to a group that I’m a member, as one of my friends was in doubt regarding how to retuning an E Marine Band to Eb(what notes to use), and after that the discussion started. Probably was some kind of graphical laziness from the graphical designer, but could you check with Hohner if it’s possible to review the tuning chart and label the notes correctly. There are some weird things like there is no C#,D#,G#,A# “rectangles”, everything is flat(b), so the notes didn’t match the scale of the tune. Diatonic F# is one example ( F#4 Bb Db F# Bb Db F# Bb Db F# Blow, Ab Db F Ab B(H) Eb F Ab B(H) Eb Draw) 
the Chromatic diagram in C is also showing flat notes and probably there are others. Not a big deal, just a detail of attention. Regarding the F#, is F#7 the highest reed available ? Just curiosity…
Hi Fabio,
I assume the graphic designer did it this way for the sake of simplicity. Plenty of people are unaware of (or confused by) the different names for enharmonic variations and like this every note only has one name, which for self taught musicians should make things simpler. Everything is b except for F#. Otherwise it would presumably be necessary to explain that Db and C# are to all intents and purposes the same note. Regarding your question about F#7, I believe Hohner also makes a high G, so the highest reed in the 10 hole harps is presumably G7, a semitone higher. They used to make the Vest Pocket Harp and Piccolo models in High Ab and High A too, but these have to the best of my knowledge been discontinued.
Thanks for answer @SteveBaker, it was exactly what I thought, and sure from a manufacturer point-of-view, they have to think most generic possible. Regarding the High G was there in the tuning chart, the first one and I missed it. Interesting, by the way. Very high pitch, I’ll have to find some use for it. Brgds.