while looking into this l came across mention of the white triangle badge and the the 1st {regular} division it is my opinion that the one you posted to day is post war and when the division was reformed with elements of the 72nd indian as to the first picture said to be the divisional sign l cannot locate a picture in any of my books on the subject also
it is not quite the same as the picture you posted one its in white over yellow two the curl looks more like horns than a twist the arm of service is not quite right ie the white line seperating the two colours is no possible some one has touched up the originals badly