Super rare to find, and no wonder—who would ever part with one of these gorgeous things?  This trifold showing 60 color samples of Rembrandt water colors with names and grade of permanency was distributed by Talens & Son, Union, New Jersey--and was clearly much referenced (surely hung--and rehung-- in a studio or art department, or perhaps in-store), with several sets of pin holes at the top corners. The samples are on individual strips of paper adhered to the card-weight brochure. Delicious.

11 3/4 x 9, 1940s I believe, and in fairly good overall condition, with edge wear, pin holes and some underline marks in blue ink but no notable tears and color is amazing--better in person.