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| The General Electric model 7F58 was known as the "Lumalarm", and cost $7.50 in 1935. The face was illuminated by a small bulb in the base just below the "6" and a tiny rheostat controlled the brightness. The numbers and patterning were applied to the inside of the crystal using a steel gray mirror finish with white highlights. The petal motif was echoed on the top surface. The case was made of black Bakelite, though a version in white Plaskon plastic was available as well, with a much different face design. |
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