1 Krogerfoot 1 month ago Hi, my debut dumb question here:I have a pair of Filtertrons that I purchased at a Texas guitar show in probably 1992. I've been carting them around since then, never getting around to putting them in a guitar. I'm wondering if there's any way to date them, at least to demonstrate that they're not recent replicas or reissues. The covers are soldered to the backs, which I could undo if needed. The pole screws are pointed and only extend through the back about 3 or 4mm.Thanks for taking my call and I'll hang up and listen.