This clock is interesting in that it pre-dates the pendulum clocks by about 300 years. These clocks operate with what we call "a verge and foliot." Essentially, the top horizontal bar moves left and then right, suspended by a thin cord. The pallet engages the escape wheel while the bar turns back and forth and the escape gear is turned in one second intervals. The original verge and foliot clocks were not very accurate. In fact, many earlier versions of this clock had only an hour hand!
Well, things do change! This clock is now extremely accurate, thanks to the genius of a talented Canadian clock maker named Joe Monincx! He made this clock revolutionary by using not one, but two escape wheels. This changed everything! The Puzzle version of this antique clock is as accurate as any wooden clock ever made.