http://www.circleglass.com/Why not just send them a pic and ask if they made them ?? If not they may know who did !! Just be sure you tell them where you are located !!
Now whats the problem with the baby plate ?? You know who made it,,and approx when made Approx 1913 to 1917,, you know the product line is Royal Devon !! Iif you are concerned about not finding another like it,, could be several reasons,,Royal Devon was for the most part hand painted !! But these were not necessarily professional artists,, just regular workers many of which were simply picking up extra household money !! Thats why the decorator marked each one they painted !! They were paid per completed piece !! Perhaps they didn`t work there very long or as in my opinion,, they realized that new mothers were not exactly enthralled with mountain goats on a Baby Plate and so very few were sold !! Is any of this going to make a difference in the value of the plate,, sadly no it will not !! People are still not enthralled with mountain goats on anything,, except perhaps the occasional hunter !!
Anything else we need to look for ??