Technical description: Rosewood with german silver keys and two ferrules at the sockets. The reed-well is conical without a step. Only the R1 keys, the E?-dup and low B keys are levers. The low C key lowers the R2 and 3 rings and closes the brille. L0: 81. L1: PP; 82. L2: T. L3: T. L4: G?; E?-dup; low B. R0: sup. R1: T; B?; C. R2: R. R3: R; F. R4: low C; C?; E?. Keymount type: pillars. Keyhead type: cups.