Not visible in the photo, but at the end of the pointy part of the bomb (left in photo) is where the fuse is inserted and held in place with a threaded cover/retaining cap.
I already told the seller that I will take the bomb but if you have a Piat and need a bomb I think I should stand aside and let you take it. I already have a complete bomb but don't have a Piat.... unless you want to sell your Piat