Escutcheon is in Charges.
Escutcheon. Little shield. Sometimes used as a Difference when it is known as an inescutcheon.
George I King of Great Britain and Ireland 1660 1727. Quartered 1 Plantagenet impaled Dunkeld 2 Capet 3 Ireland 4. 1&2 Brunswick Luneburg, 3 Hanover, an inescutcheon over all three, gules the Crown of Charlemagne Proper (As Archtreasurer of the Holy Roman Empire).
James Scott 1st Duke Monmouth 1st Duke Buccleuch 1649 1685. King James I of England and Ireland and VI of Scotland 1566 1625 differenced with a baton sinister argent overall an inescutcheon of pretence of Scott.
Esme Stewart 1st Duke Lennox 1542 1583. Quartered 1&4 John Stewart of Darnley 1st Count Évreux 1380 1429, 2&3 Stewart a Bordure Engrailed gules for difference, overall an inescutcheon of Lennox the heiress of whom was Elizabeth Lennox Countess Évreux 1370-1429 wife of John Stewart of Darnley 1st Count Évreux 1380-1429. Source.