That's kinda why I thought it might be original...?
Yeah the previous owners seemed pretty handy, but then I do something simple like change a towel bar and find that they used mismatched screw lengths and 3 phillips head and one flat head.
Oh well, What can you do?
How to install a towel bar
One: Find towel bar at resale store.
Two: Sift through your jar of odds-and-ends nuts, bolts and screws until you find enough screws that will fit through the bars holes.
Three: find all necessary drill bits
Four: Hold the bar to the wall with one hand while you hold the drill with the other. This will avoid anything being level.
At this present moment in time I am making cabinets for the kitchen - just in case you wanted to know what I'm doing when I'm not around.