Offered for purchase is this wonderful true vintage original to the late 1960's school chart poster. It is titled "El Gusano de Seday sus Derivados" (Silkworm and it's Derivatives) and features Silkworms and Moths, and products derived from them. Dimensions are 18-3/8" tall x 26-7/8" wide. The finish is a varnished satin sheen unlike the matt finish you usually see on vintage school posters. Condition is excellent with a few small minor wrinkles here and there, and a light vertical bend down the middle that would flatten out when framed. It has never been framed or tacked to the wall. Darker area at the upper left in the photos is a shadow and not on the poster. See my other listing for additional Mexican school chart posters from the same estate.