Spencer Company Eye Test Chart on Board vintage pencil set Details are best for color

Details are best for color of both ink and paper

and would guess it dates to the 50s or 60s

with the same form and black bristles marked as such on its handle

Larger brush is 10 1/2" long

which makes it slightly off-round

Spencer Company Eye Test Chart on Board vintage pencil set Details are best for colorI 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