I just found this old crusty Shure SM-57 that was actually in the process of severe corrosion from humidity. The foam pad piece underneath the missing windscreen was turned to dust when I poked around in the top capsule. Apparently, the element is still okay-- expoxyed in as it was originally but this particular 57 sounds really AMAZING as is now! Everything is hunky dory there and the Switchraft XLR connector is still in good shape too, looks like it has next to no corrosion. I just took some label remover and took all the old duct tape off of the barrel and then took some OOOO steel wool and isopropyl alcohol and cleaned the outside body as best I could. It has dents and dings from probably thousands of gigs but this microphone sounds like a Stradivarious violin when used for guitar cabs. The best one I've ever heard in fact. Does anyone know how to date these 57s? Mine says "Unidyne III dynamic, Made in USA Shure Brothers Patented" I wonder just how old is this one? Looks really beat to me but it is better since I cleaned it off. Smooth again to the touch. Gotta find me another one of this vintage.