The imitations usually have a better obverse-to reverse alignment. Like a US coin, if you flip a coin top to bottom, the obverse will be right side up. If you flip a Borland imitation, if you flip the chip over left to right, the hot stamp will line up. Most real production chips were not made to such exacting standards. The Borland’s are found on "NEVADA" and "DIECAR" molds. There is often some "bleed over" on the hot stampings. Some say the hot stamp is darker or more bronze than gold, but I have found that difficult to detect unless I have both a real and a counterfeit side by side. I think there is a similar response on one of the boards. CC>CC site perhaps, that is where I learned the info.