Mostly new, some used, 1920 to 1940 before the advent of sealed beam bulbs, all are low beam/high beam rated 6 to 8 volt DC.
Following bulb numbers available: 373, 1000, 2320, 2330, 2331, AV5676V; your choice $8 each or all for $45. Even work in your original Knuckle Head or Chief.