Big Ben electric alarm clock in brown Bakelite® case. Luminous dial.
Dates made: May 1948 - November 1952
This model has a brown Bakelite case labeled “S6-D” on back. Height 5 1/8”. The motor runs the clock and winds the alarm mainspring. The plain dial model was introduced in December 1947, and the luminous dial model was introduced in May 1948. Both models were last shipped in November 1952.
The dials are two-tone. At first, the outside was beige and the inside off-white. Starting about November, 1948, the colors were reversed.