I'm no clock expert but the clock definitely isn't 200 years old. I'd say closer to 100 years old. Late 1800's-early 1900's. The "Made in USA", pressed wood, and the style of the clock (gingerbread style) tell me that. It is still beautiful, just not as old. With missing parts, I would say it is worth around $75. It really takes a lot for an old clock to be worth money. It has to be really special, fancy or gold gilt to have significant value. I have one from the 1840's with a few missing pieces and it might be worth $100, if I'm lucky.
For comparable clocks, you can go to ebay and search for "gingerbread clock". Current ones on ebay are in the $30-$50 range.