Lovely clear crystal charger with swirl designs surrounding the center of the bowl and marked on the ground base on the back, Kosta 761N5 Warff. I believe that means the piece was made in 1976 but not sure about the other numbers in the series. I think Warff joined Kosta in the mid 60s and became one of their top five designers. Apparently, his wife also worked for the company so I am not sure to which of the duo this piece should be attributed. It appears that the signature is easy to read and precisely etched, and other Ann Warff pieces have this same signature. This dish is in good condition with no chips, cracks or discoloration. There are some abrasions, some little patches of scratches here and there which probably occurred when this piece was stacked with other pieces of glass. These little spots that are about the size of a pencil eraser and there are a few single one inch long scratches. In other words, it is not new and has some wear. The size of the bowl is 10 and 5/8ths inches and it is quite thick and heavy.
I have another Warff design bowl listed and it too has the same signature.