Say, looking at the pix … Is that a very early model Burke? It doesn’t have the black tip, or the characteristic tuning collar shape. And the fipple looks rough.
Do you know the year and/or model designation, for reference?
I’ve played a few early Burkes, and they’re nice whistles. But the design has definitely evolved over the years.
On the back its engraved " LowDAL Pro MB 7/2001". I purchased it on this forum about a year ago, if I remember correctly. Its nicely machined, but the secondary(?) ramp looks to be hand finished. Maybe that was done during the voicing.