STEP ???: Silver-bowled Lamps [Bowl of bulb is silvered color]
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OPTION A: 550a - (Figure 207 – thumbnail) “Bowl of bulb is silver colored.Bulb has a silver coating on the outside of the bowl (the lower part of the bulb) which shields the bright filament from direct viewing while reflecting the light upward for indirect illumination when bulb is mounted base up. Filament is double-coiled. This is a silver-bowled lamp first introduced in 1935. ” (Go to A38 - Figure 207.)