Uncertain is the lace is hand made/decorated. Two sections to the collar. Outer lace is gathered to form a circle, button in the middle to finish collar. Two pieces of lace joined to smaller piece of lace to form a circle going around the neck and joined on ends in back with snap.
Per the donor and the rfd, Mary is written next to the object name.
This indicates the piece was made by Mary (A Zahller).