Scale of mine in the low register, low to high. Note the thumbhole is between 1 and 2, unlike a recorder.
T 123 456 F#
T 123 45- A
T 123 4-6 Bb
T 123 4-- Bb a bit sharp (as for ussak mode, maybe?)
T 123 -56 B
T 123 — c
T 12- — c#
T 1-3 456 d
T 1-- — eb
T -23 4-- e
- 12- — e
T -2- — f
T -23 456 f#
So I’d say it’s basically ussak on A, and it’s not easy to see why the lowest note is so high. It plays more easily in the second octave.