The product is a vintage lot of 4 Singer sewing machine instructional booklets from the 1930s. These booklets provide valuable information and guidance on how to use Singer sewing machines, with specific instructions for various sewing techniques and projects. The booklets are a rare find and offer a glimpse into the sewing practices of the past, making them a unique collectible for sewing enthusiasts and collectors. Made in the United States by Singer, a well-known brand in the sewing industry, these booklets are a valuable resource for anyone interested in vintage sewing techniques.