I love old letter slots. I live in an old borough full of history with many old houses. I always notice the letter slots on the doors.
They remind me of the old days back when I had pen pals and actually hand wrote letters, put a stamp on them and then mailed them. They create such a nostalgic feeling of simpler times.
There's something about brass on doors, too.
Not to mention that font on the "LETTERS." Absolutely beautiful.
Did you have a pen pal growing up? Have you thought about getting one as an adult?