Daum Glass Signatures: Nancy Cameo Period vs. Modern Crystal Identification
Daum Frères of Nancy, France has produced art glass continuously since 1878, making it one of the longest-running art glass houses in history. Their output falls into two very different collecting categories: the Nancy period (approximately 1890–1940) cameo and enameled glass in the Art Nouveau and Art Deco styles, and modern Daum pâte de verre crystal (1968–present). Nancy-period pieces sell for $1,000–$50,000+ depending on complexity and form; modern crystal pieces sell for $200–$3,000. Correct identification of which category you're looking at is the foundation of correct pricing.
Nancy Period Signatures: What They Look Like
Nancy-period Daum pieces carry one of several signature formats. The most common: 'Daum Nancy' in script, usually with a Cross of Lorraine (double-barred cross) nearby — this cross is the symbol of Lorraine province and appears on virtually all genuine Nancy-period pieces. The signature is typically wheel-engraved, acid-etched, or enameled directly on the piece — it becomes part of the decoration rather than an afterthought. Earlier pieces (pre-1900) sometimes use 'Daum Frères Nancy' in full. The script varies slightly by hand but maintains consistent letterforms. Photographs of genuine signatures are widely published and can be cross-referenced on a phone.
Cameo Technique and Quality
Daum's Nancy-period cameo work used acid etching to create relief decoration — layers of colored glass over clear or differently colored grounds were etched away in patterns to create depth. The finest Daum cameo shows multiple acid-etching levels (3–5 depth planes) creating genuine three-dimensional relief. The surface texture of etched areas is slightly matte and feels different from the polished non-etched areas under your fingertip. Additionally, Daum frequently combined acid cameo with hand-applied enamel painting, adding further color and detail in a third production step. This combined technique — cameo plus enamel — is distinctly Daum and is not replicated in fakes at the quality level of genuine work.
Modern Daum: Pâte de Verre Crystal
From 1968, Daum shifted its primary production to pâte de verre — a technique where powdered colored glass is packed into molds and fired, creating translucent sculptural pieces. Modern Daum pâte de verre is signed 'Daum France' (without 'Nancy' and without the Cross of Lorraine in the same historical format). The signature is typically engraved on the base. The pieces themselves are sculptural, often depicting flowers, animals, or figures in rich colors. Modern Daum is valuable in its own right and should not be misidentified — it simply has a different value range than the Nancy period work. Confusion most often occurs when sellers label modern pâte de verre as 'antique' based on style alone.
Fakes and Misattributions
True Daum fakes are less common than misattribution (modern work sold as Nancy period). When fakes do appear, the cameo quality is the tell: Daum's multi-level acid work creates smooth, graduated depth with no tool marks between levels; fakes show abrupt depth transitions and the glass surface between levels often shows scratching or grinding marks. The Cross of Lorraine on fakes is often poorly drawn — the two horizontal bars should be parallel and the lower bar should be longer than the upper. A Cross of Lorraine that is symmetrical (both bars the same length) is wrong. Enameling on fakes is single-layer and thick; genuine Daum enamel is thin and built up in transparent layers.
On-Site Authentication Steps
Find the signature and look for the Cross of Lorraine — its presence strongly indicates Nancy period. Confirm 'Nancy' in the signature (absent on modern pieces). Examine the cameo surface under raking phone light — count the depth levels (2–5 is typical). Touch the cameo surface — etched areas feel slightly rough; polished areas are smooth. Look for enamel painting added over the cameo. For modern pâte de verre, the translucent quality is immediately apparent — light passes through in a diffuse, glowing manner. Research the form and color combination against published Daum references on your phone before committing to purchase.
Search FindA.Sale to find estate sales, auctions, and consignment shops listing French art glass near you — preview items online before attending sales.