Antique Lamp Supply recommends picking up the lamp and looking for a manufacturer's symbol, name or date stamp embedded into the base. Also look on the lighting fixture itself; sometimes, the manufacturer includes a sticker that includes the name, or date of manufacture.
How do you stabilize a floor lamp?
Twist the top portion of the lamp tube (post) clockwise while holding the bottom part steady to tighten a tube that is loose in the middle of the lamp body. Do the same for other parts on or attached to the tube to tighten them.
How do you measure a floor lamp?
To determine the right size, measure the height of the lamp base from the floor to the bottom of the bulb holder, then divide by four to get the approximate height for the shade. Trust your eye. The perfect shade should hide the fittings underneath without encroaching on the lamp base.