tie with a prince charlie?

[Lyle1]

What if the tie is worn without the waistcoat?

Again, I think it is a matter of proportion. The cut of the lapels on a PC draws your eye to the lower part of the torso. Without a waistcoat, a long tie is accentuated, and with a bow tie and no waistcoat, the shirt is accentuated. The PC really looks better with a waistcoat whether it is the traditional low cut or a higher cut waistcoat.