Without a picture to go by, it is very difficult to visualize exactly what these look like. The narrower middle with crescent cutouts is the problem (I think). Would these half-moon or crescent cutouts have fit into something like metal frame, buffet line, warming dish, etc.?
Maybe you could draw a picture from memory, scan it, and post it? A drawing would be a big help.
Does it look like this by any chance? SHANNON HVY IRELAND CRYSTAL RELISH PICKLE SERVICE BOWL!