Trubka delšj (f)
The modern (common [i.e. official]) spelling of the adjective is "delší".
Mostly made of lime tree.
Kuhač, Franjo Š. [Šaver]: Prilog za poviest glasbe južnoslovjenske: Gajde [Contribution to the history of South Slavic music: Bagpipes]. In: Rad jugoslavenske akademije znanosti i umjetnosti, knjiga L (Zagreb, 1879), p.49¹ (»Sumrlok*); *NB: ➺ my remarks to Kegdy for the confusion about the name Sumrlok.
ws (linguistics [➺ Dictionaries, &c.]).