Vintage Cast Brass/Bronze Passage Doorknob Set Threaded Spindle Late 19th-20th Mid Century

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This is a vintage cast brass or bronze passage doorknob set featuring a threaded spindle, dating roughly from the late 19th century to the mid-20th century. Component Breakdown The Knobs: Round, smooth commercial or residential interior door knobs with a uniform aged patina. The Spindle: A standard threaded spindle (the center square rod). The small ridged threads along the rod allow the knobs to be screwed tightly to fit the exact width of your door. Set Screw Hole: The small round opening on the neck of the lower knob secures a tiny set screw into place to lock the knob onto the spindle so it does not spin loose during use.