(San Francisco?): (n. d.). 1st printing (presumed), ca 1960? Unpaginated, though 8 pages. Printed french-fold style, so 4 pages of text. Eye chart to each of the 4 printed pages, with the center letter printed in red. 4-3/8" x 2-7/8". Off-white printed card stock covers, sewn. Faint signs of use, Nr Fine. Item #46300
"An Irishman went to the optician to have his eyes tested. ... the optician concludes the Irishman is blind, for 'everytime I show F you see K.'"