View-Master Model A Viewer [UNWARPED] - vintage- standard lens - 3rd versionView Master Model A Viewer [unwarped] vintage standard lens Condition: excellent NO WARPING with Original Library Box and Accompanying papers Composite Plastic manufactured c. 1940 1941, it is the third issue viewer. Early third generation viewers still were sold in a soft cardboard box that was gold with blue (rarly found intact). Later, the third generation viewers were sold of stury two piece boxes. Almost all Model A viewers have minor to severe