This bulb has the following features: carbon paste beads at the junction of each inner lead and the carbonized split Japanese bamboo filament and a shorter stem tube, resulting in shorter platinum lead-in wires.  This bulb was manufactured in 1889.  Shorter platinum lead-in wires were used from 1889 onward.

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START 2 || Tipped-Bulb-Options 3 || Base-Shape 4 || Bulbs-With-4-6-Threads 5 || Filament-Material 6 || Stem-Seal 7 || Filament-Connections YOUR BULB