Those are probably New Old Stock (NOS) calibrated at the factory in 1985. There seems to be a batch of them floating around in the market. For example...briand said:I received my screwdriver yesterday. It seems to work good, I set it for 12 in-lbs, tightened a tank screw and it "felt" about right. I will try to get the calibration checked before I use it much because the calibration sticker is dated July 1985 but the driver still looks new, unused and appears to be really high in quality.