From the OHS PC Database, derived from A Guide to North American Organbuilders, by David H. Fox (Richmond, Va.: Organ Historical Society, 1991). — as "C.M. Oman"

Immigrated to the United States, 1891; with Aeolian firm of Garwood, New Jersey; representative of Hillgreen-Lane firm of Alliance, Ohio, in New York City, New York; established his own firm in Brooklyn, New York, c. 1899.

From the OHS PC Database, derived from A Guide to North American Organbuilders, by David H. Fox (Richmond, Va.: Organ Historical Society, 1991; rev. ed., 1997, with updated information). —

Born 1853 in Sweden; immigrated to the United States, 1891; with Aeolian firm of Garwood, New Jersey; representative of Hillgreen-Lane firm of Alliance, Ohio, in New York City, New York; established firm in Brooklyn, New York, ca. 1899; died 1910.

Sources:

-Boston Organ Club Newsletter 127:2.
-Peter T. Cameron.
-Elizabeth Towne Schmitt.
-John Slawson.