The California manufacturer Hallfield Pottery was founded by Bill Fields and James Hall, and is known for the high quality art pottery they produced in the 1950s. I can't confirm that TV lamps were part of their catalog, but the lamp shown below is clearly marked Hallfield and dates undoubtedly from the '50s.
It looks like this Hallfield Stallion is about to take off! While it doesn't come out well in the photos, this lamp has a beautiful gold iridescent glaze.
|Back view of the Hallfield Stallion. The base of this TV lamp, probably once hidden by protective felt, is the in-mold marking, USA Hallfield.|