This is SS gift, Thank You! It's a very lustrous and perty coin. On the flip it said "dot" I am assuming that it is the dot below the bust? Anyways, the error is at 12 o'clock rev. rim. Here are a few different perspectives. The beading on the rim in the area are very sporadic.
I am assuming your coin is Medallic Alignment The issue you see is on both sides.. right? It could be Finning. Folded over from circulation. IMHO
The picture on the Numista webpage also shows an issue in the same area.. could be because of the Security Edge? https://en.numista.com/catalogue/pieces10613.html
There are many areas on the rim that look like what you posted above. The area in question is raised above, and much larger, The rim area seems to have a small crack on the third edge from about 11-30 to 1, also the missing beads on the third side? There is also another spot at about 7 oclock that has a disruption in the detail as well (third side).
I had also wondered if this was normal to the series. This is my first Half Rupee, Thanks Guys. It still puzzles me.