James, I noticed you liked the look of your grandfather clock so much that you posted it twice.
Welcome to Tnet from Toronto!
Stylistically, your clocks case looks to date to the Federal Period.
"Federal furniture refers to American furniture produced in the Federal Period, which lasted from approximately 1789 to 1823. Notable furniture makers who worked in the federal style included Duncan Phyfe and Charles-Honoré Lannuier. It was influenced by the Georgian and Adam styles, and was superseded by the American Empire style. Pieces in this style are characterized by their sharply geometric forms, legs that are usually straight rather than curved, contrasting veneers, and geometric inlay patterns on otherwise flat surfaces. Pictorial motifs, when extant, usually reference the new federal government with symbols such as the eagle. The Oval Office grandfather clock, made by between 1795—1805 in Boston by John and Thomas Seymour, is a noted example of the federal style of furniture.
A grandfather clock is a tall, freestanding, weight-driven pendulum clock with the pendulum held inside the tower or waist of the case. Clocks of this style are commonly 1.8—2.4 metres (6—8 feet) tall. The case often features elaborately carved ornamentation on the hood (or bonnet), which surrounds and frames the dial, or clock face. The English clock-maker William Clement is credited with the development of this form in 1670. Until the early 20th century, pendulum clocks were the world's most accurate timekeeping technology, and longcase clocks, due to their superior accuracy, served as time standards for households and businesses. Today they are kept mainly for their decorative and antique value, being widely replaced by both analog and digital timekeeping."
I would like to see a couple of pics of the clock mechanism, as these were often put in more up-to-date cases based on the owners decorating trends.
If your clock can be attributed to a well-know American maker, you may have found an important piece of US history.
Dave
PS. I had to clean-up and straighten your pics to better see the detail.