As pointed out earlier, Panzerstecher is just German for armour piercing sword. In French it’s estoc and in Hungarian it’s hegyestor, etc.
If the sword in Istanbul looked like this, it’s likely a Turkish/Ottoman armour piercing sword. This particular item is displayed at the Imperial Armoury in Vienna. It’s war booty and was captured from Mikailoglu Kasim Bey outside Vienna in 1532.
The Tulwar above looks like it could be an armour piercing sword, but the tip seems surprisingly obtuse if designed to penetrate chinks in chainmail. Perhaps it’s just a decorative item used for display or rituals?
