Antique China Cabinet

I inherited in the 1980s and was told at that time that it was over 100 years old. I have searched for markings and cannot find any. It has 3 removable shelves with display grooves. The bottom shelf does not have a groove. The glass has a wavy texture like in older items. It is beautifully carved, with overlay on the glass. I have searched and cannot find anything comparible. I also have the original skeleton key. There are a couple of small damaged areas, but nothing too severe. It really is a beautiful piece and I would love to know what it is worth.

Good