Schubert / Carl Schubert
Thanks to Nophachai for showing me these two Albert system clarinets. These were made in Austria by the major maker there. Note that these two clarinets (Bb and Eb models) have a screw adjustment not just at the barrel, but also above the low E/B tone hole. This was made so that the clarinet could be adjusted to play in high pitch or low pitch. Terrific!