Quote Originally Posted by Mike_Oettle View Post
When knights wore their arms on their surcoats, this principle applied there, too.
Where a lion faces to the dexter, he must face to the dexter on both front and back. So he faces the right shoulder on the front of the surcoat, and he still faces the right shoulder on the back – that is, he has been flipped around to face the correct way.
Regards,
Mike
Sorry Mike. I've got to disagree. This did not happen in UK usage.

This is the tabard of a Pursuivant of the College of Heralds:



Note that on both arm pieces the CoA faces the viewer correctly, that is to say in accordance with the blazon, not flipped. Note also in the lower right we can see what is the back of the tabard. Again the Arms are in accordance with the blazon and not flipped.

It might have happened in Continental usage, but not in the UK and not sanctioned by either Garter or Lord Lyon.

Regards

Chas