Welcome to Southern Oak Iron Works. You have found a 6/81 manufactured by Mine Safety Appliances American Bridge Company Division of United States Steel quick release tool belt with original unused 3 strand tie off rope in a wrap. This belt has missed the boom and remains one of the cleanest, unused belts you will probably run across without the original MSA protection bag. Found and preserved by Southern Oak Iron Works Collection. Take this ole unused relic to the top to make the zeros rhyme or hang it up on the mantle for the conversation of a lifetime. From my hands to yours. GOOD LUCK & WORK SAFE.