Hi,
Merry Christmas.
Even with the new photos the achievement is really just about impossible to positively identify. After looking at your photos, I have come to the conclusion that they are possibly not genuine arms at all - that's just my opinion. That conclusion is for a number of reasons:
1. There are supporters without any coronet/crown of a peer.
2. There is no motto.
3. The crown shown is that of a 'ducal coronet' which is an heraldic charge and has no social status whatsoever.
They definitely aren't Griffins - to me the one on the right looks like a winged dog, and that on the left looks something like a winged 'beast' composed of the upper half of a Bear with the hind quarters of a member of the goat or even deer family - a rather unusual combination.
The contents of the shield are almost impossible to determine other than the upper left charge appears to be a Cross Formée fitchée and then it becomes indistinguishable. I can't even actually confirm if the shield is quartered or not.
The Bend, which is actually a Bend sinister, appears to be charged with three Round Buckles which, in itself, means nothing at all other than a possible difference to another similar coat of arms.
I'm sorry I can't be more positive. You might have to resort to the services of one of the larger auction houses, such as Southerbys and see if they can come up aith something more positive. If you feel that you might have sufficient funds, you could even approach the Officer in Waiting at the College of Arms in London for a possible identification. You can initiate an enquiry with them via the following URL -
http://college-of-arms.gov.uk/Enquiries.htm If you do have any success elsewhere, it would be appreciated by all readers if you could let us know the outcome.
May I wish you a Happy Hogmanay.