There are 3 Models with model number 66S in the database
Keno style 3 alarm clock in green case with non-luminous dial. Base model with top alarm shutoff knob.
Dates made: July 1934 - July 1941
Keno style 3 alarm clock in black case with non-luminous dial. Base model with top alarm shutoff knob.
Dates made: January 1935 - July 1941
Keno style 3 alarm clock in black case with luminous dial. Base model with top alarm shutoff knob.
Dates made: April 1935 - July 1941
