Which jaw harp is best for a beginner?

Concave Case

Concave Case
Simple cases for Altay komuses
Oberton Pro Lab measurements:
Overall dimensions: 90x42x23 mm (?)
Archived model (?)
Altai komus case Vladimir Potkin and little Kazantsev-Minakov. It protects jaw harp from mechanical damage and, to some extent, from dirt and is recommended for use if the instrument is planned to be taken anywhere from the house.