Which is one of the reasons I think yours is a pullet.
I said mine crowed, but I didn't say it is a rooster. She is now a 3 year old hen who crows. She also mounts other birds at times. But, she is very much a hen and lays a beautiful blue egg.
The color of the comb on yours is about right for the age. I don't see any saddle feathers starting. You could spread the feathers so you can look to see if any are starting, though. The red that Kiki mentioned, I think is more a brown. The legs do look thick in one picture, but others not so much. You haven't heard any attempts at crowing, yet. I say pullet.