How far along do you think this egg is?

My calls got off their nest today and I brought the eggs into the house to finish incubating... I first candled them on January 26 and I assumed they were around 5 or 6 days old since there was only a little veining... If thats the case, then theyd be like 19 days along now... Heres a pic I took a couple hours ago.. how far along do they look to all you Call duck experts?? The mom was off the eggs for a couple hours, but I think I got lucky and caught it in time..