Keyless flute fingerings: 3rd octave
Margaret Fleck

These fingerings are compiled from a variety of charts for the keyless flute, fife, and pennywhistle. No guarantees about what might work on your instrument. They are just things to try. If you have a fingering chart from the folks who made your instrument, try those options first.

O is an open hole, X is a closed hole, % is a half-closed hole. R means to try both open and closed variants.

Likely Also suggested
D#/Eb XX0|X0X XX0|XXX
E XX0|00X, XX0|0XX XX0|0X0, XX0|XX0
F X0X|XXX, XXX|XXX XXX|XX0, X%0|0X0
X0X|X0X, XXX|X0X
F# X0X|X00 X0X|XRX, XXX|X0X, XX0|XX0
G X0X|000 X0X|00X, XXX|00X, 00X|XXX
G#/Ab 00X|000 XX%|00X, XX0|XRX
A 0XX|XX0 0XX|XXX, 0X0|0X0
XX0|0X0, XX0|00X
XX0|0XR
A#/Bb 0X0|X00, XX0|X00 XX0|0XX, X0X|000, X0X|XXX
B X0X|0X0 X00|000, X%0|000
C X0X|0XR
C# 000|0X0 0X0|00X
D (4th) 0XX|00X, 0XX|XXX