Nothing new. You have seen them all before:

Henry .577

Henry .577 and Henry .450 Hammer Doubles

J. Purdey .500

Henry Hammerless .450 and Henry Hammer .450

The Woodward doesn't seem to have its own post on NE.com but has been shown in several threads, and at this link. In fact, the little avatar photo attached to the Double Rifles forum here is a photo of the muzzles of this rifle.

Curl