Antique Rubber Goggles Nod & Shake Laboratory Firemen 1922 With Orig Box Prop

NOS 1920's Antique Cover's Rubber Goggles Gas Tight
Nod & Shake
Patented by Harvey S. Cover in 1922
Outer Box Reads:
"Gets rid of fog without removing the goggles from the face. Protects against anything."
"For the use of Firemen, Chemical workers, Lime Handlers, and those working in very bad dust, fumes and gases that injuriously affect the eyes."
Inner box lid reads:
Directions for Using Cover's New Gas Tight Rubber Goggles
Put water in the chambers and turn the goggles so any surplus runs out. What remains will be just right. Clear the glasses of moisture by "nodding and shaking the head." The natural movement of the body will often be sufficient if the wearer is actively moving about. Keep the glasses CLEAN.
Pat No. 1,433,676
Goggles are in great condition with just some minor dust / debris. Box shows signs of age but is fully intact.