Great pics. Most Americans have no idea of this dress code and don’t own it - it is called “White Tie” and it is the most formal of the hierarchy of men’s attire. Very rare to see white tie occasions in the US, though they are more prevalent in the UK.
Girls really go crazy, ‘bout a sharp-dressed man.
The problem with white tie is most men now have gold studs and cuff links and white tie requires platinum or white gold.