From a collection of bulbs that is being first offered to market is a very nice 1890's this rare TH based bulb has an intact and continuity tested hairpin filament. Upon close examination, the filament is a carbonized twisted thread material. This is a rare feature found on very few surviving examples. The tip is in perfect condition, and overall this is a beautiful example of a mid 1890's bulb. This light bulb will be shipped double boxed to insure safe delivery. Please see m...y other listings for similar early electrical items. Happy to combine shipping!