rockrooster-cortez-tan-6-inch- 。They were manufactured in the USA by union labor under Factory #638 for the Boot & Shoe Workers\' Union. ? Reading the Inner Stamp Specs 7 ½ D: The exact size and width (Men\'s 7.5 Medium/Regular width). Style 9624: The specific model/style number for this smooth brown leather side-zip design. USAS Z41.1-1967/75: This is the dead giveaway that these are vintage safety boots. It indicates they meet the United States of America Standards Institute (USAS) protective steel-toe compression and impact requirements updated between 1967 and 1975. Factory #638: The official designated factory number for the Boot & Shoe Workers\' Union (which later merged with the UFCW). Composition: \"Leather Upper and Lining / Balance Man Made Mat\'ls\" (indicating the heavy-duty composition/rubber safety outsole). ? Technical Specifications Brand: Santa Rosa Brand Style Number: 9624 Era: Vintage (Late 1970s to 1980s Deadstock Era) Style: Western Dress / Roper Silhouette Ride-Zip Safety Ankle Boot Safety Feature: ANSI/USAS Certified Protective Steel Toe (Internal) Closure: Heavy-duty medial side zipper Origin: Made in the USA (Union Made)