Vintage pair of Smith & Wesson handcuffs with key. Here is what is written on them: the number 704451, Made in U.S.A., Marcas Registradas, Smith & Wesson, Springfield, Mass. Pats Pending. On the back is the Smith & Wesson logo, with Trade Mark above and below, and REG U.S. PAT. OFF. They work fine, selling as found, no flaws to note. Possibly model 90? Let us know if you can tell us the year they were made. Glad to answer any questions..