1. Bohemian Glass Ateliers & Crystal Hallmarks (1880–1938)
Loetz Witwe (Klášterní Mlýn)
Acid-etched or engraved signature "Loetz Austria" or crossed arrows with four dots in a circular stamp, used predominantly between 1898 and 1908 on iridescent Phänomen glassware with rich oil-slick surfaces.
MARK: LOETZ AUSTRIA / OVAL PUNCHMoser (Karlovy Vary / Carlsbad)
Moser pieces feature engraved script "Moser Carlsbad" or etched medallion under base. Lead-free potassium glass with extreme optical clarity, hand-faceted bowls, and gilded oroplastic relief bands.
MARK: MOSER KARLSBAD (GILDED)Kralik & Harrachov
Characterized by pulled feather patterns, cobalt cameo casing, and polished concave pontil ground bases. Often carries arched block letters stamped in ink during early Czechoslovak Republic export (1918–1938).
MARK: CZECHOSLOVAKIA ARCHED2. Prague Secessionist Lithography & Prints (1895–1925)
Mánes Union Workshop Blindstamps
Original Czech Art Nouveau and Secessionist posters carry embossed blindstamps of "Spolek výtvarných umělců Mánes" in the lower margin, frequently paired with hand-numbered proof sequences.
STAMP: SVU MÁNES / DRY EMBOSSMetallic Ink & Paper Rag Fiber
Genuine period posters utilize heavy rag paper with visible deckle edges and multi-stone metallic gold or bronze pigment overlay that shows specular luster under angled lighting.
PAPER: HEAVY RAG / STONE INKPrague Printer Colophons
Look for printer attributions along the outer margin border such as "Unie Praha" or "B. Stiebling & Co." executed in micro-typography typical of pre-WWI Bohemia.
COLOPHON: IMP. UNIE PRAHA3. Biedermeier & Historic Bohemian Furniture (1815–1860)
Joinery & Drawer Dovetailing
Authentic Bohemian Biedermeier secretaires feature hand-sawn, irregular dovetail joints on inner pine drawers, paired with bookmatched flame walnut, birch, or cherry veneers.
CONSTRUCTION: HAND-SAWN DOVETAILSGuild Ink Stencils & Guild Paper Labels
Often marked on the reverse side of bureau backs or underside of desk lids with circular ink stencils from Prague or Brno master cabinetmaker guilds.
MARK: PRAGER TISCHLER ZUNFTEbony Stringing & Bone Escutcheons
Look for solid ebony veneer stringing and hand-carved bone or mother-of-pearl keyhole escutcheons rather than stamped brass mounts.
HARDWARE: HAND-CUT BONE ESCUTCHEON4. Bohemian Pyrope Garnet & Silver Jewellery
Color & Refractive Testing
Genuine Bohemian pyrope stones are deep pigeon-blood red with pure fiery red undertones under incandescent light, containing zero brown/orange shifts characteristic of almandine.
REFRACTIVE INDEX: 1.74 – 1.77Historical Tombac & Silver Settings
Pre-1920 Bohemian pieces were set in "Tombac" (a brass-copper alloy) or silver stamped with the Austro-Hungarian Diana head punch (number 3 for 800 silver or 4 for 750 silver).
STAMP: DIANA HEAD / G2 / 900 JBRose Cut Pavé Architecture
Stones are closely packed in cluster formation with multi-faceted rose cuts without prong gaps, often centering a larger cabochon or Bohemian moldavite crystal.
STRUCTURE: GRAIN PRONG PAVÉ5. Bohemian Cartography, Manuscripts & Bindings (1700–1890)
Watermarks & Chainlines
Handmade Bohemian rag paper displays horizontal chainlines and distinctive watermark emblems including the Bohemian crowned lion or Jesuit atelier marks.
WATERMARK: CROWNED BOHEMIAN LIONCopperplate Engraving Plate Marks
Genuine 18th-century maps of Prague Castle, Vltava basins, and Bohemian spa towns feature distinct indented rectangular plate impressions with hand-applied watercolor washes.
TECHNIQUE: COPPERPLATE INTAGLIOPrague Ex-Libris Bookplates
Monastic library stamps (such as Strahov Abbey or Clementinum duplicates) and armorial ex-libris plates affixed to marbled pastedowns provide critical date provenance.
PROVENANCE: EX-LIBRIS MONASTICA6. Czechoslovak Brussels Style & Industrial Chronometers (1950–1975)
Pragotron Master Clock Markings
Industrial station and factory clocks feature the triangular "Pragotron" emblem on bakelite or enameled steel dials, stamped with model numbers (e.g. PJ27, CP4) and Czechoslovak norm stamps.
MARK: PRAGOTRON TRIANGLE / ČSNMeopta & Optikotechna Optics
Cameras (Flexaret series) and laboratory gauges carry engraved serial plates with the double-prism Meopta emblem and "Made in Czechoslovakia" engraving on the magnesium body.
MARK: MEOPTA PRISM LOGODitmar Urbach & Keramika Majolica
Post-war Czechoslovak ceramics feature the winged 'T' stamp or sailing ship mark, alongside aerodynamic geometric slipcast glazes in mustard, mint, and charcoal.
STAMP: WINGED T / DITMAR URBACH