Classic Morchang with a big deviations of all its properties: the sound pitch is from medium to high, the stiffness of the tongue is from moderately medium to moderately hard; volume / sensitivity around average; background noises level is from medium to strong. It is convenient to strike in both directions, but in the “trembling” specimens this reinforces the vibrating inharmonic overtones much stronger. It is quite possible to penetrate the spirit of India.
The difference in most models is in frame design only, but due to scatter every jews harp will sound differently.