I have a pelham bit that I know to be 40+ years old. I am pretty sure it’s nearer 60+ years old.
I have the noseband of a Bobby’s bridle that is 30+ years old. The entire hunt bridle was gifted to me 15 years ago. It had been out of use for many years. The lack of use prior to my getting the bridle caused a bit of dry rot in a couple of places.
I have a BT Crump dressage saddle that was gifted to me. It is probably 30-40 years old. It is too narrow for anything I have now, but several of the horses I used it on in the past seemed to like the fit.