I purchased a strange IBM Selectric III font ball - "Symbol 96" - this one prints out only symbols and no letters. I suppose it would be used for when you need a section mark, an infinity symbol, or a copyright sign. It never even crossed my mind that those characters would be missing from every other 96-character font ball.
Here's the neat box this ball shipped in - all tucked away, still secure in its original packaging. The ragged "IBM" cardboard and the sharpie stain really add some character. Nifty.
On the other hand, there are certainly a plethora of unintuitive characters to choose from here. The SHIFT key does change the character, and I'm wondering how anyone keeps track of what symbol goes to which key. There must be a manual I've missed!
The image of this font ball's characters is hosted on my Flickr and is in the public domain. Scan it, recreate a font from it, or make it into art!