The main part that gets my attention is the cossed keys motif.
I did a google on that and came up with some cities generally in your area called Cross or Crossed Keys. It laso has religious meaning, although the part that goes in the lock would have a crucifix shape.
If those really are keys thenit's odd that the end that goes in the lock are not the same, that may have some meaning.
If those aren't keys then i don't know what they are, I'd say they have to represent a pair of keys.
http://en.wikipedia.org/wiki/Cross_keys