Within a few weeks male specific feathering will come in for the boys, so you don't have too long to wait.I will try and get a comparison photo with its sibling Araucana I have of the same age to show the difference in comb.
The one on this thread was a runt, which could explain the late development if it's male compared to another male I had from a different breeder who was obviously male from much younger.
I'm hoping I'm wrong about it being male, but appreciate your input.