Vintage Seth Thomas Mantle Clock see (Video) Needs Adjustments

  

Vintage Seth Thomas Mantle Clock see (Video). The right side needs to have a shim under it for the clock to continue running. The gong for the hour and half hour is backwards.

Time seems to be fast, think its because of the raising of the side? The weight is not included. I had to borrow one from a friend who also has a Mantel clock, so I had to give it nack.