Red Wing Work Boots (Used) Size: 9D The ancestor of the Iron Ranger?! These Red Wings were purchased in 1992 at the now-defunct Shinjuku Marui Field. I wore them when I was a student, but they've been stored for over 30 years. There are surface scratches, but the inside is relatively well-maintained. Please check the condition in the photos. • ANSI Z41: American National Standards Institute (ANSI) safety footwear standard. Primarily refers to the 1983 version (PT83). PT83: Stands for Part 83 (PT83), meaning it complies with the 1983 standard, or a model from that era (often seen on boots with a sole manufacturing year stamp around '83). • MI/75: Impact Protection 75 foot-pounds. The toe area can withstand an impact of 75 ft-lbs. • C/75: Puncture Resistance 75 pounds. The sole can withstand a force of 75 pounds without being punctured. • EH: Electrical Hazard protection. Protects against the danger of electric shock.