I will look at the cylinder backplate when i get home and take more photos to add to this thread. Maybe we can get to the bottom of it!
I appreciate your time and attention.
It is not marked as Webley, and i realize they licensed production out to other gun makers of the day. There is the back story that James W. Rosier from Melbourne auctioned two of these off in early 1900's. One went into a private collection and one purportedly came to the U.S. the article reads : "In October 1916, when prominent Melbourne gundealer, James Rosier, was auctioning his business, a collector by the name of Mr. H.W.Fry stood in the crowd and bid. He secured two .577 Webley revolvers, one of which in time would pass into the collection of Mr. D.L. Archer who wrote of his purchase in his notebook in 1928. The other Fry purportedly took to America."
article can be found at http://www.armscollectorsguild.com/pages/about.htm
and this one DOES bare Rosiers engraved name on the top of the frame. I think that may help tie it to being a Webley, Webley & Scott said only one version of that revolver they produced has the Webley markings. I havent found any markings so far other than the three hallmarks previously discussed.