Hi, I wouldn't rule out 50's Skrdlovice. Colour tone can be deceptive in photos and I find it can be a tricky issue to discuss, as monitors vary, eyesight varies, imaging equipment varies.... I would not rule out Skrdlovice. They made a lot of very similar bullseye patterns in the early 1950's. Quite lovely quality too. I have never seen three turn up at once, but that doesn't mean anything! The flat polished base is acceptable too, some early fifties Skrdlovice has a flat polished base with slightly chamfered edges, some plain flat.
Robert (bOBA)