Every lamp directory on the internet, including the one you are reading, eventually gets the same question from someone holding their grandmother's old table lamp: is this worth anything? The honest answer is that most old lamps are worth twenty to fifty dollars as fixtures, but the small percentage that turn out to be Tiffany, Handel, Doulton, or signed industrial-era pieces can reach four or five figures at auction. The difference between the two outcomes is identification, and identification is a learnable skill. This guide covers what to check, in what order, before you spend money on an appraisal.
Flip the lamp over. Real value concentrates in signatures and maker's marks, and they hide in predictable places: the base plate, the underside of the base, the socket housing, and — on table lamps with separate bases and shades — the fitter ring. Bring a flashlight and a magnifying glass.
Names that consistently carry auction value include Tiffany Studios (with the engraved signature under the base), Handel, Pairpoint, Doulton, Aladdin (for the mantle lamps, not the modern replicas), and Miller. A paper sticker alone is weaker evidence than an engraved or cast mark, because stickers transfer. Photograph every mark you find before cleaning anything — aggressive cleaning destroys marks, and destroyed marks destroy value.
The fastest dating method is the wiring and the socket. Cloth-wrapped wires, push-button sockets, and absence of a ground pin generally indicate pre-1940 construction, which is the era collectors pay for. The shade material matters as much as the base: original Tiffany Favrile glass, Handel reverse-painted panels, and Slag glass panels are the categories that drive five-figure results, while later fiberglass and plastic shades indicate a reproduction era lamp.
Materials that photograph as "old" but carry little collector value include most cast spelter (a zinc alloy that masquerades as bronze — test with a magnet; spelter is not magnetic but it is much lighter and chips to show gray metal), resin "Tiffany-style" shades, and anything stamped "made in China" or "made in Taiwan," which postdates the collectible eras.
Collectors price condition brutally, and lamps are judged as working objects. Before any valuation, check:
A professional restoration can rescue a rare piece, but an amateur repair on a common piece usually finishes the job of destroying value.
A short list of instant warnings: "Tiffany style" stamped anywhere (Tiffany Studios never stamped that phrase — the words indicate a replica category by definition); perfect symmetry in hand-painted decoration; modern screws or Phillips-head hardware on a supposedly antique base; and a price at a flea market that seems too low for the signature on the base. The signature is the thing being faked most often, because it is the thing buyers check first.
Once identification points to a valuable category, pricing happens in three stages. First, search completed auctions — not live listings — for the exact maker and form, because asking prices are fantasy and sold prices are data. Second, check what local appraisal options cost versus online appraisal services, which review photos for a modest fee. Third, remember the dealer rule of thumb: a dealer pays roughly a third to half of retail because they hold stock and wait for the buyer. Selling at retail takes longer but keeps the full number.
Why does a lamp directory site publish a collector's guide? Because the readers browsing by lamp type — aladdin lamps, antique oil lamps, floor lamps — are the exact people who eventually find an unlabeled old lamp at an estate sale and wonder what it is. The directory organizes lamps by type and era; the collector's guide tells you which of those types to take seriously. Both start the same way: flip the lamp over, and look.