I change the "typed" message for different occasions, and put a personal welcome in it for when guests come to visit. You could also put scripture in it, or how about a love note for someone special! Any old typewriter will do, and the great part is, it doesn't even have to work to use it!
This was the message I put in it when my daughter and her family came for Thanksgiving. I used a font on my computer called 'old Typewriter'
"...you shall love the Lord your God with all your heart, and with all your soul, and with all your mind, and with all your strength." Mark 12:30