Help - WHAT is this bit ring called?

[_BrionesRider]

I’m trying to find out what this type of bit ring is called.

http://www.trumbullmtn.com/wp-content/uploads/zilco-del-endur-bridle-large-500x390.jpg

It is an interesting curved D ring, which is pretty much the distinguishing feature of it. If anyone knows what it’s called let me know.

Thanks

[Mouse_amp_Bay]

That is a Sprenger B-Ring Baucher that has oxidized. Here is a link to the shiny version:
http://www.bitofbritain.com/Herm_Sprenger_KK_Ultra_B_Ring_Baucher_Bit_p/772-rent.htm

[_BrionesRider]

Thank you so much!