Bassoon Oscar Adler & Co. model 1361 professional

27 keys, 11 oval rollers, F-sharp/G-sharp trill key, C-sharp/D-sharp trill key, E/F-sharp trill key, A-flat/B-flat trill key, automatic G brille, high E key, E-flat key at wing joint, high D key, self-acting piano mechanism operated from the low E plate, piano mechanism for left-hand thumb, additional double C key, 3 additional oval rollers for right-hand thumb fingering, silver-plated metal parts, Accessories: 1 bassoon case, 1 bassoon crook No. 1, 1 bassoon crook No. 2