If you ever decide to let go of that lens, I'd love to take it off your hands.
It might not be the same as the older 55/1.2, but it's a damn good lens, if rather heavy for its size. Especially on an SR-T body.
I also have a 200mm telephoto, branded for JC Penney (!). Nobody seems to know who built this thing, not even the guys at the old Essex Photo, where I brought it for an overhaul (those MC type lenses would sweat grease from the helical if they overheated, which would then deposit on the aperture blades and slow them down so that everything is overexposed).