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DJR Expert Guide Series, Vol. 463 — How to Authenticate Antique Globes & Scientific Models
Antique globes and scientific models—terrestrial and celestial globes, orreries, telluriums, anatomical models, and classroom teaching devices—represent some of the most important educational objects of the 18th–20th centuries. Because originals were produced in small numbers and were heavily used, surviving examples often show wear, restoration, or partial replacement. Meanwhile, the modern market is filled with decorative replicas, artificially aged reproductions, and incorrectly attributed globes that mimic the look of age without the craftsmanship or materials of true antiques.
DJR Expert Guide Series, Vol. 463 provides the full professional methodology used to authenticate antique globes and scientific models. This includes evaluating papier-mâché cores, printed gores, varnish layers, map content, construction methods, typography, engraving and lithography traits, stand hardware, maker labels, patina development, mechanical gearing, and restoration indicators. The guide also covers dating using geopolitical boundaries and print-style analysis.
Inside this guide, you’ll learn how experts:
Identify authentic construction materials including papier-mâché cores, plaster underlayers, printed gores, and shellac varnish
Evaluate gore cutting, placement, shrinkage, alignment, and engraved or lithographed detail
Date globes using geopolitical clues such as country names, borders, and colonial-era boundaries
Distinguish copperplate engraving, lithography, chromolithography, and modern digital printing
Authenticate stands, meridian rings, horizon rings, and mounting hardware based on era and maker
Analyze patina, craquelure, oxidation, discoloration, and varnish condition
Evaluate maker labels, typography, ink quality, and cartouche design for authenticity
Authenticate scientific models—orreries, telluriums, and mechanical demonstrations—using gearing, material consistency, and construction quality
Detect restoration, relacquering, overpaint, replaced components, and reattached gores
Identify modern décor reproductions, inaccurate map content, and artificially aged surfaces
Apply rarity, size, originality, maker attribution, and subject matter (celestial vs. terrestrial) to determine value
Whether evaluating a 19th-century celestial globe, a Victorian tellurium, a Weber Costello terrestrial globe, a Replogle school model, or a hand-built scientific demonstration device, this guide gives collectors and appraisers the precise methodology needed to authenticate antique scientific objects with confidence.
Digital Download — PDF • 8 Pages • Instant Access
Antique globes and scientific models—terrestrial and celestial globes, orreries, telluriums, anatomical models, and classroom teaching devices—represent some of the most important educational objects of the 18th–20th centuries. Because originals were produced in small numbers and were heavily used, surviving examples often show wear, restoration, or partial replacement. Meanwhile, the modern market is filled with decorative replicas, artificially aged reproductions, and incorrectly attributed globes that mimic the look of age without the craftsmanship or materials of true antiques.
DJR Expert Guide Series, Vol. 463 provides the full professional methodology used to authenticate antique globes and scientific models. This includes evaluating papier-mâché cores, printed gores, varnish layers, map content, construction methods, typography, engraving and lithography traits, stand hardware, maker labels, patina development, mechanical gearing, and restoration indicators. The guide also covers dating using geopolitical boundaries and print-style analysis.
Inside this guide, you’ll learn how experts:
Identify authentic construction materials including papier-mâché cores, plaster underlayers, printed gores, and shellac varnish
Evaluate gore cutting, placement, shrinkage, alignment, and engraved or lithographed detail
Date globes using geopolitical clues such as country names, borders, and colonial-era boundaries
Distinguish copperplate engraving, lithography, chromolithography, and modern digital printing
Authenticate stands, meridian rings, horizon rings, and mounting hardware based on era and maker
Analyze patina, craquelure, oxidation, discoloration, and varnish condition
Evaluate maker labels, typography, ink quality, and cartouche design for authenticity
Authenticate scientific models—orreries, telluriums, and mechanical demonstrations—using gearing, material consistency, and construction quality
Detect restoration, relacquering, overpaint, replaced components, and reattached gores
Identify modern décor reproductions, inaccurate map content, and artificially aged surfaces
Apply rarity, size, originality, maker attribution, and subject matter (celestial vs. terrestrial) to determine value
Whether evaluating a 19th-century celestial globe, a Victorian tellurium, a Weber Costello terrestrial globe, a Replogle school model, or a hand-built scientific demonstration device, this guide gives collectors and appraisers the precise methodology needed to authenticate antique scientific objects with confidence.
Digital Download — PDF • 8 Pages • Instant Access