I have two Wyandottes about nineteen twenty weeks-females 110%-and yesterday i got an egg that looked like it could have been from one of them. It was pinkish white (almost fully white but had a pinkish tinge that is hardly noticeable. After looking again i would say it is all white, but there is a teeny bit of pink. I have Columbian Rocks but they lay tan eggs and not looking like this at all) with some wrinkles, suggesting it was from a pullet who was just beginning to lay. But it was a large egg. Don't pullets lay small eggs at first? Think it could have been from one of them?
