My guess is it's an old TRW piston. But, I wouldn't throw it away just yet. If the top land isn't collapsed, skirts aren't collapsed or scored, nor the pin bosses, the top damage may just be cosmetic and easily cleaned-up with a little polishing. If it's a TRW then expect the top ring land to be very thick and unlikely damaged.

Which engine? 440, 400, 426W, 383?