Different natural minor harmonica sign! Lee Oskar tuning key vs Other tuning key
Bb natural minor harmonica tuning = Lee Oskar F natural minor harmonica tuning
Lee Oskar minor tunings:
https://leeoskar.com/wp-content/uploads/2015/05/NaturalMinor-Notation-Chart.pdf
Other minor : http://www.suzukimusic.com/harmonicas/notation/