Awesome phone

I was looking for a classic rotary telephone bell ringtone (still haven't found a good one that I can lift without paying for) and I ran across this. It is an awesome idea. Unfortunately, I lack the technical know-how after about a third of the way through (they lost me right after remove the casing). Anybody here know enough to throw one of these together? I'd love to carry one around and talk on it, as idiotic as it might seem.