Serial number starting with M00.......
Serial number starting with 100.....
The serial number of Google Glass is not written on the glasses,
it is visible in the screen of the glasses when starting them
The serial number of the RealWear glasses appears on the inside of the headbar just behind the foam strip on the battery side. Just unclip it to get the serial number.
The serial number of the N500 is located behind the battery compartment. Remove the battery from the glasses and you will find the serial number starting with "MP".
The serial number is located inside the glasses, as shown in the picture.