I have a dozen of these heavy solid cast aluminum flower pots in several sizes and shapes. They were purchased at various garage sales and thrift shops over the years. None of them have a manufacturers mark on them so I can't provide any more detailed information. People who are interested in the same look could always silver leaf an ordinary flower pot. My friend Sam and I have experimented and developed our own Poor Man's silver leaf using regular kitchen foil that does the job so long as your tongue is firmly in your cheek. Step one, cover any object with watered down Elmer's glue. Step two, apply a layer of aluminum foil and press down until firmly adhered. Step three, cover with a clear coat of two-part epoxy or clear varnish. We've tried various options including cutting the foil into squares to make it look like real silver leaf, as well as crinkling the foil and then smoothing it out before applying. Cheap, easy, fun.
Note: Include a picture and your question gets posted first