Son of Carl August Otto ; b. July 15, 1844, Ludwigslust. Pupil of his father in Ludwigslust, 1860-65 ; worked with his cousin, Ludwig Otto,, in Cologne, 1865-66, then went to Hanover, where he worked with Aug. Riechers till 1872. In the same year started his own business in Düsseldorf, at 16, Schützenstrasse, where he still works, assisted by two workmen.
He is very skilful at repairs, and has repaired about 850 fine old instruments. For his new instruments he uses beautiful wood, not less than twenty years old, and follows the Stradivari model, large pattern, using good oil varnish, orange colour, of his own invention; the tone is of fine, full quality. He himself accurately determines the thicknesses of back and front, cuts the sound-holes, places the sound-posts, carves the scroll, and does the varnishing. About 238 violins, 13 violas, and 33 violoncellos have been made.
He gained first prizes at the Exhibitions in Düsseldorf, 1880 ; Melbourne, 1888; and Chicago, 1893. His son now works under him.