Which jaw harp is best for a beginner?

ND547 "Chasappa" Khomus

ND547 "Chasappa" Khomus
Yakut Khomuses
Oberton Pro Lab measurements:
Gaps: 200-250 µm (?)
Fundamental frequency: 75-85 Hz (?)
Reed stiffness: 100 gf (?)
Frame stiffness: 900-1100 gf (?)
Reed size: 85-95x20 mm
Overall dimensions: 90-100x40x4 mm (?)
Weight: 30 g (80 g with case)
How flawless the appearance of this Yakut khomus is, the level of its sound is so souvenir. The constant background rumble is almost louder than the main sound, and large gaps allow you to play, just by clutching decks with your teeth - and even so, you can’t squeeze much of the instrument.