DuMont

Salesman's handbook

Early 180 (Cossor 437) ca 1937	Early 181 (Cossor 137) ca 1937
180 (1938) 14 inch. Sales brochures	180 (1939) 14 inch.  Sales brochures
181 (1939) 14 inch with radio. Sales brochures and photos of a surviving set	182 (1938) 14 inch. Sales brochures
183 (1940) 14 inch. Sales brochure	183X (1941) 14 inch.  Sales brochure
184 (1939) 12 inch. Sales brochure	190 (1939) 9 inch. Sales brochure
192 (1939) 9 inch. Sales brochure	195 (1940) 20 inch. Here are internal memos about the set

This picture, from a 1950s DuMont brochure, shows Allen DuMont with a prototype set. It looks as if it has a magnifier on the screen, and it is unclear if it is a mechanical or electronic set.