Lucy Interior Design Good morning! I can do some more investigating on these knobs because I'm sure they are from a showroom in our design center but I know that they are pretty basic and if you would like, you can get similar antique brass and crystal/glass knobs at any shop that carries hardware for doors, cabinets, etc. Hope this helps! If you have any further questions, don't hesitate to ask. Also, I took the liberty to look for a couple options for you online, just to get you started:
http://www.myknobs.com/calcryscrysk.html
http://www.thehardwarehut.com/catalog-product.php?p_ref=270400
http://www.thehardwarehut.com/catalog-product.php?p_ref=837
http://www.thehardwarehut.com/catalog-product.php?p_ref=23949
http://www.thehardwarehut.com/catalog-product.php?p_ref=13370
http://www.thehardwarehut.com/catalog-product.php?p_ref=13410
Cheers!
http://www.anthropologie.com/anthro/product/home-hardware/073182.jsp
http://www.anthropologie.com/anthro/product/home-hardware/873168.jsp
Cheers, Lucy Interior Design