WWI Marshal Foch General Pershing Joffre Dubail Paris Stereoview Card -SC236 For Sale

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Shipping method is USPS Ground Advantage, shipped in a cardboard mailer.
For each additional eligible item you buy- Shipping is $1.25

(alsoknown as a stereograph or stereoscope card)
by Keystone View Company Publishers
Copyrighted 1917 Keystone View Company
Measures Approx.: 7 x 3 1/2inches

Pre-owned condition consistent with use and age. Mayhave some imperfections, some stains,
edge and corner wear, corner scuffs, and minor discoloration fromage.SHIPPING
Stereoview Cards will be mailedvia USPS Ground Advantage.
For each additional Stereoview card you buy - Shipping will be $1.25 Why are stereoview cards curved instead of flat?
Stereoview card manufacturers intentionally curved the cardboardmounts inward because
the concave shape enhanced the three-dimensional depth illusion, helped ambientlight better
illuminate the twin photographs, and reduced distracting reflections or glarefrom the stereoscope’s lenses.