With a Capital 'K'

My Grandfather often used the expression "Class with a Capital 'K'" when remarking on things that were done with unique excellence. So it was no wonder that the phrase came to mind once again when a mysterious black envelope arrived in the mail... sealed with a 'K'. Our name and address was handwritten in silver ink, no return address and a silver wax seal on the back. I tried to think of everyone I had ever known with a last name beginning with 'K'. I came up blank so I opened it. Inside was an invitation to a New Year's Eve 'Black & White Affair' from Keystone Church. Now that's Klass!