Help identifying marks on diamond ring?

[Spartcom5]

Found this awhile back and never found out what the markings were because of really bad pictures. I am much better at getting a mark picture so her we go again. This is a .2 carat diamond set in 800 silver. Also 5% gold 2% platinum. The Diamond is a transitional cut and probably early 1900s. The marks look like a horse? The initials W.O. or W.U. and then some undecipherable symbol. I assume the horse is the key mark here. No luck though. If anyone can help me out here this is an amazing ring and I'd love to know more!!

 

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[Spartcom5]

No idea guys? This is by far one of the nicest diamonds I have ever found.

 

[Drmad7]

Nice diamond but sorry, no idea on the mark.

 

[JimDon]

It appears to be Chinese export. Wing On & Company is most likely the maker. Just abbreviated to W.O.