Floor Lamp

Lamps like this tend to date from the second quarter of the 20th century, check the shade to see it it's marked and get back to us. If the shades noT marked comparable generic floorlamps can still sell for as much as $300.00 at auction.

I would add a couple points as well:

Your lamp is one of the fancier ones, so likely would go for beteen $200 and $400.

The big bulbs it takes are called "Molly" bulbs and are still available if you look around.  Alternatively you can buy adapters to adjust them down to the current bulb base size for about $25 +/-   (Essentially it's just a ceramic piece that screws in where the bulb goes but has a reduced opening in it for the current sizes.)

I have two of these myself and they are great!  Careful about the diffuser though! That gets expensive to replace, especially if they are marked.

Enjoy it!