I am not a clock expert, so I can't tell you much about your clock. I do, however, have the same clock--the Lake No. 3 made by the William L. Gilbert Clock Company sometime between 1871 and 1934.
Based on my research, I believe it is a style called "gingerbread" which was very popular in the 1880s. I think they started making it at least as early as 1871, and I am under the impression that mine was made, probably, about 1875, but I really don't know for sure.
Mine is slightly different from yours, but it is a Lake No. 3. The design on the glass is different and the raised carving above the glass is different. Otherwise it is identical. If you do find out more about your clock, I would love to hear about it, as it would apply to mine, as well. You can reach me at vmgoble --at-- gmail --dot-- com. [I'm trying to disguise the email address to minimize junk mail. You will to make it into a real email address.]
Vicki
Additional Information by: VMG
I have found out a little more from a clock repair shop. My Gilbert Lake No. 3 has a patent date of June 3, 1879. I assume that means it was manufactured at about that time, but I don't know for sure.