Anthea Moore Ede Girls Wool Dress Vintage (?)

I don’t have much information about this brand,based in London; described in an article as being a favorite of princess Diana for the princes.The dress is wool, classic, gorgeous.Excellent condition other than:-One of the top buttons is a little chipped. You could move that button further down if you don’t want it to be a focus.-Markings on inside lining, as shown.There is no size tag. Looks like 12/14.-Shoulder seam to bottom, 33.4”-Armpit to armpit (flat/across front), 16.5”