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I tried having a closer look at their feather this evening but I have no idea what I'm looking at

I don't know what other breeds he had he was an old man in his 80s he didn't even know what age they were. He said he has the incubator running constantly. He did say he had a french maran rooster and judging by the feathered legs of legs of the 4 chickens I bought and the colouring I would say that they all have some maran in them. The older two are naked neck x maran. They have the feathered legs too. I guess I'm just going to have to wait and see. I think now you might be right about the age maybe 9 or 10 weeks as if they were younger the feathers are a bit scruffier looking. I must have looked at every chick between the ages of 6 and 12 weeks to see what they looked closest to.

I wonder if the naked necks are 3 weeks older or 6 weeks older than them if he is constantly incubating there would be about 3 weeks between each batch. I guess I'm just going to have to wait and see. I will let you know what they turn out to be after. It's been so frustrating reading posts of people asking for people's guesses but never giving an update if the Guesses were right