Can you take a pic where you or somebody else has a hand under the first layer of saddle feathers, right before the tail? White feathers blend together so much, I'm not sure if I'm seeing male saddle feathers or not. If I am, then they're late... but I'm not sure. Usually a cockerel of that age would be well into their saddle feathers.
If there are no pointed feathers in the saddle area, hiding, then that's a pullet.