Hello all and thanks Brian for adding me. A brief intro and a question. I live and work in the Algarve, Portugal and work for a UK style Auction house. I often have to use lock info for dating furniture which is how I found this forum (Although have just realised the thread title looks like I'm looking for a new girlfriend). On to my first question !
We've just had a large consignment from a French lady whose late husband was a keen collector of antiques amongst this was a very large lock. It comes with very little information and no written provenance but allegedly came from Temple prison in Paris built in the 13th C and destroyed in 1808. Obviously when I describe and item for auction I cannot write anything thats speculation, so currently its just a large old lock. I would welcome your views about its age and likely origins. photos below.
Many thanks. Tim
Click image for larger version. 

Name:	P1470352.JPG 
Views:	16 
Size:	179.0 KB 
ID:	19367Click image for larger version. 

Name:	P1470354.JPG 
Views:	16 
Size:	302.6 KB 
ID:	19368Click image for larger version. 

Name:	P1470355.JPG 
Views:	15 
Size:	180.6 KB 
ID:	19369Click image for larger version. 

Name:	P1470356.JPG 
Views:	14 
Size:	212.8 KB 
ID:	19370