This is a typical PCB from ebay, front and back side:
The sides are identical, and not mirrored. Which is funny because the
A row on the front is the
X row on the back.
Is there a logical/practical reason to this, or is it just convenient for the manufacturer to print only one layout instead of mirroring the letters on the other side? I would find it much more useful if the letters were mirrored and could be used to uniquely identify a hole, no matter which side I am looking at the PCB from.