Lonnie Bird had a plan published in FWW some years back for Penn. flat top clock. It's a good plan for the intermediate woodworker. You may be able to fine it in an old copy or online. Probably not the style your interested in though.
SAPFM has a federal period clock in their down loadable plans. Its not a plan for the beginner and you have to be a SAPFM member to access it.
Stephen