Spencer Company Eye Test Chart on Board color theory puzzle so I feel pretty confident

so I feel pretty confident of the attribution

1946--shortly after the end of the WWII and beginning of Allied occupation

There are some very small chips to the surface around the interior of the lip

but I think such a winning one

Spencer Company Eye Test Chart on Board color theory puzzle so I feel pretty confidentI believe this eye test chart dates to the mid to late 1940s; I have found some references to the Spencer Company of Mount Vernon that produced it from around then, including in Popular Photography magazine advertising photography equipment. I have found no matches for it out there anywhere though, so am not sure how much traction it gained as among optometrists though with its terrific mix of text and patterns and color it seems like it would have