At this magnification I can't see anything wrong with the IGWT, but try to get it magnified. At second exam it does look "fat". The other feature looks like it was struck with a die that had grease (or something) filled in that spot. Use the search engine - top left of page - to search for " Grease Filled Die".
See if you can get that area magnified and re-post on this thread if you can. One side looks a bit abraded.
See if you can get that area magnified and re-post on this thread if you can. One side looks a bit abraded.























