What type of setting head is this?

[metro]

Hello, all! Newbie here! I''m looking to replace the tubal head in my airline solitaire setting to something more finished and elegant. I''m totally in love with this type of 6-prong head. Do you know what this is called?

Here''s what I invision it might look like in my airline setting.

 

[belle]

royal crown

 

[metro]

Thank you!

 

[metro]

another question...

anyone know where i can buy a setting like this in 14K wg? Or maybe just the head?