I think this is a probably a pullet.Micro at 13.5 weeks, any clearer yet? I'm still on the fence.
I raised a Blue Laced Silver cockerel and 4 Black Laced Silver pullets last year.
My cockerel at only a few weeks.
By 13-14 weeks he definitely looked all boy! He had so much more silver than the girls, his comb was starting to thicken and his saddles were coming in.
I had one pullet with the dark area across the back of her neck. See her standing at the top of the ramp? I was wondering would 'she' be a late developing cockerel. Her comb and wattles were way more red than this picture shows. But she is a hen now and lays almost every day!
Good luck with your birds!