I have a SAGBRAI (RAGBRAI before it was RAGBRAI) shirt from 1974. Doesn't fit anymore, but I can't part with it.
I have a full length coyote fur coat that is quite old but in excellent shape. I can't wear it unless it is below 0 degrees. The furrier thinks it's from the 50's. I also have a mink cape that older and good shape.
I have my grandfathers hunting jacket from the 30's or 40's. He was a well-known trapper that made a decent living do that. I don't know what to do with it, and throwing it away seems so wrong, so it hangs in the closet.
It's not clothing, but my husband has the rosary and small saint statute his great grandfather carried in WWI. Next year my parents will celebrate their 65th wedding anniversary and my Mom can still fit in her wedding dress.
I still shovel snow in this one piece green work suit of my grandpa's, seems like something made specifically for farmers, probably 40-60 years old but still in great shape.
I may need to borrow your mink cape this weekend. It's collection day from my working ladies and I need to represent.
My oldest pieces of clothing are the blue FFA t-shirts I used in high school when showing pigs at the county fair, circa 2000-2004. Our ag adviser believed in good quality cotton shirts, so that's what we got. I've moved enough so that I've made more than a few runs to Good Will to get rid of old clothes that aren't worn anymore, but these shirts are the only "relics" I've kept.