There are 2 Models with model number S2D in the database
Ben Bolt electric alarm clock in black case with nickel, brass or painted trim. Luminous dial has black numeral band on off-white.
Dates made: August 1933 - December 1938
Ben Bolt electric alarm clock in black case with nickel, brass or painted trim. Non-luminous two-tone off-white dial.
Dates made: August 1933 - December 1938
