Gemieinhardt M3 flutes are excellent flutes for the transition from intermediate to advanced/professional.  This Vintage flute hails from the 1970's.  I have personally tried out this instrument and found it quite playable,   to get the most out of the instrument I would have it adjusted / fine tuned to your personal tastes by a competent repairman you trust.  I like the way the open holes fit my hand position; I would keep this flute if I didn't already have a great low b open hole flute that I use.