Help! belgian bearded d'anver Sexing

[BantamAshley]

i have a 3 week old blue belgian bearded d'anver. Would anyone with experience with this breed be able to tell me what traits I can start to look for in determining the sex?
I understand he may be to young right now, but I’d just like to know what I can keep an eye out for, as I have found minimal information on sexing this breed looking on the internet.
Thank you very much for your time!

 

[Cyprus]

As mentioned in your other post, watch for comb and sickle growth.
Again, looks like a pullet.

 

[Mini Moe]

I was told that our 4-5 week old chick is a D'Anver roo.