One of a series of bulbs and components illustrating the manufacture of the "Svea" glow lamp; bulb as first blown with hole in end for exhausting tube and with flange turned.
"Svea" glow lamp; bulb as first blown with hole in end for exhausting tube
"Svea" glow lamp; bulb as first blown with hole in end for exhausting tube
One of a series of bulbs and components illustrating the manufacture of the "Svea" glow lamp; bulb as first blown with hole in end for exhausting tube.
