Mostra (f)
measuring staff for correct spacing of fingerholes
From Italian "mostra" [sample] ?; Measuring staff for correct spacing of the shoulders between the fingerholes (NB: ➺ Brdašce (Bosnia & Hercegovina)), not of the fingerholes themselves.
Brömse, Peter: Flöten, Schalmeien und Sackpfeifen Südslawiens. Brünn [Brno], 1937, p.76.