Just because a bod has scratched a registration number and the word 'Stolen' onto anything does not mean that someone's subsequent possession of the item is automatically wrong or illegitimate.
Simply add "NOT" in front of the word stolen and alter the letters/numbers to make an alphabetti word.

Plus the bod doing the stealing isn't going to see any engraving until the clock set is in his grubby mitts, so it's no deterrent whatsoever.
