Issue #32642: Northwatch Keep Weapon Rack Plaques
There are two weapon rack plaques near the exit with the Master lock that have another one stacked on it, with the steel swords visually overlapping.
One is D6C0B and D6C0F.
The other is D6C09 and D6C05.
There is a weapon rack plaque in the middle room of the dungeon, C1A91, with a steel sword that can only be retrieved by aiming at the tip of the sword.