. "Frederick Mathushek" . . . . . "Mathushek Piano Mfg. Co." . . "Mathushek Piano Manufacturing Co." . . "Mathushek Piano Co." . . "1891" . . "Frederick Mathushek" . . . . "Mathuschek, F." . . "1814" . . . "Mathushek & Son" . "Mathushek & K\u00FChner" . . "Mathushek & Kinkeldey" . "Mathushek" . . . . . .