The product is an antique advertising brass metal ruler featuring the Mayer Co. logo and etched with Indianapolis. This vintage piece is a unique collectible item that combines both functionality (as a ruler and letter opener) with a touch of nostalgia for advertising enthusiasts. Made in the United States, this brass ruler showcases the craftsmanship and design of a bygone era, making it a desirable addition to any collection of merchandise and memorabilia from the early 20th century. Please reference all photos for condition and measurements.