They look exactly like the pure Legbars, I have no idea which hen is laying the olive eggs. Olive eggs are always quite variable. They often have darker spots typical of Welvummers, but not always. A few were even closer to grey than olive in color.
Molly laid her first egg today. It is grey! I was surprised about the color. Since I got it at evening time, I wasn't sure if I saw the true color.