Tongue Blocking
Hibrid approach 123 pucker, above tounge block
Tomlin Tongue Blocking vs Lip Pursing Puckering https://www.youtube.com/watch?v=q9gVFA1sMvU
Ben Hewlett : Tongue Blocking on Harmonica – why bother? https://www.youtube.com/watch?v=_gYVOJfFke8
DeFord Bailey was Tounge Block player.