Antique secretary desk

I believe this piece to be between 100 and 150 years old.  It's been handed down through the family, I know it was my great-grandfather's, and possibly my great-great-grandfather's (I'm 50).  There are supposed to be 3 of the turned 'spire-like' pieces on the top.  You can see one on the left, there is one in the middle (not shown) and the place on the right where one is missing (I have it though).  Also missing is a 'goblet' shaped piece of molding from the center of the top piece.  Please forgive my lack of knowledge of proper terminology.

Thanks