"Mahogany Stereoscopic Viewer With "underwood & Underwood" Stereo Card"
Trapezoidal shaped stereoscopic viewer with curved mahogany edges. Stereoscope sold complete with an "Underwood & Underwood" card titled "The pillow fight" The stereoscope is suitable for viewing paper and glass stereoscopic plates measuring 9 X 18. The lenses are in excellent condition and the viewer works perfectly. At the front, two eyepieces with adjustable converging lenses with ogee and pinion mechanism. On the opposite side of the lenses is a frosted glass plate to diffuse the light to see the glass plates, above it, a mirror to reflect the light for the illumination of the cardboard plates. https://www.lavalisearlesienne.com/product-page/visionneuse-st%C3%A9r%C3%A9oscopic-acajou-avec-carte-st%C3%A9r%C3%A9o- underwood-underwood 
Le Magazine
Rivista Artiquariato
TRÉSORS magazine