Yes, ESCUTCHEON is a Scrabble word!

Letter values in Scrabble US: E 1, S 1, C 3, U 1, T 1, C 3, H 4, E 1, O 1, N 1.

Is it a valid word?

ESCUTCHEON is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a flat protective covering (on a door or wall etc) to prevent soiling by dirty fingers
(nautical) a plate on a ship's stern on which the name is inscribed
a shield; especially one displaying a coat of arms

Also: finger plate.