A few years ago, I was trying to identify this exact coat of arms. Alas, I have not been able to track down the specifics of what we found, but the upshot is that no one has been able to identify the owner of this coat of arms.
(For those wondering what they could be, the charges on the bend are variously blazoned as chapes, crampets, or boterolls. They are the protective metal pieces at the bottom of a sword scabbard.)
If I can track down the earlier research, I will post the results here.
David