Double glare. The glare shows where the
Machine Doubling is. The flat surface reflect the glare.
Note on this image. The image in blue in is what you are seeing, while the lower image (that show slight glare) is what we are seeing.
Machine Doubling is an alteration of the coins devices right after strike. The devices are reduced in size. You are looking at the outside edge of the devices. That is where
Machine Doubling is found on a doubled die, the doubling is seen on the center of the devices, not on the outside edges of the devices.

Note the normal size images (#1) The
DDO (#2) and the machine doubled example (#3). What is the differences. Note the first image the normal one. The devices are the normal size, next image down the doubled die. The devices are wider in the centers. And the last image showing
Machine Doubling. The overall size id there, but the
Machine Doubling is reducing the normal size of the devices. You are looking at
Machine Doubling. It is a machine issue. A doubled die is doubling on the die that makes the devices larger. On is worth once cent. The other is a die variety and depending on condition, is worth many times for than the doubled die. Look at the centers of the devices. If they do not appear enlarged, stop there and move on to the next coin.
Machine Doubling is not a premium, a doubled die is. Trying to help you save your time.