Equivalent to a tux

[WClarkB]

For black tie events the Argyll, three button waistcoat formal shirt and black bow tie are the equivalent of a tuxedo. While you can dispense with the waistcoat for evening or formal wear in favour of a dirk belt, the waistcoat really does add to the formal look-- something the Highlanders of old would have appreciated.

OR

The Highland equivalent to the "Tuxedo" dinner jacket is what is called the Prince Charlie coatee, which is made similar to an ordinary tailcoat, but the tails are cut shorter, and are embellished with scalloped flaps as are the cuffs on each sleeve. The less formal Argyll jacket, which is often sold in black is more the equivalent of morning dress, since it does not have satin lapels, is worn with an ordinary necktie, and can be worn for business, or dressy social functions where black-tie is not required.

I am still in a quandry (btw the pics on the thread that Panache did for tis specific subject and that I failed to re-find when I wanted them, are gone); he came down on the side of the PC)