In his
L'art arabe, E. Prisse D'Avennes has a picture of weapons and a helmet which he attributes to Tumanbay II, the last Mamluk sultan of Egypt, who was executed by the Ottomans in 1517. Among the weapons is a dagger. I have no idea if these really are the arms of Tumanbay or where they are now, but here is the picture:
On a side issue, The Museum of Islamic Art in Cairo has a sword attributed to Sultan Tumanbay I, who reigned in 1501 for about 3 months.
Edit: Rivkin, I've just recognised that picture of yours, that's in the military museum in Cairo. Interesting Museum, it has some good stuff, a lot of rubbish and a lot of very dodgy captions.