Milandro.
I took one of your pics, cropped and enlarged it, and rotated the pic to orient the gangya horizontally (as we usually view it). This is a good quality picture to consider whether the gangya is separate. The red arrows on the right indicate two areas that have been filed similarly. The top one is clearly not detached, so the bottom one is consistent with it also not being detached (although it may still be). The red circle on the left highlights the down-turned line that may be engraved or a line of separation. To my eyes it does not appear to pass through all structures, and is therefore not a line of separation, although cleaning off some of the oxidation within the small circular area (that a line of separation would have to pass through) would give you a definitive answer. Just some rolled up 220 grit sandpaper worked around in there would be sufficient to get a better look inside that drilled hole. You might also look to see if the lines on each side meet the greneng in the same place.
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