The Spitzen-egger is due to hatch on the 18th. Markie hatched on May 3rd, so 5 weeks. I am the worst at being able to tell by looks with this breed until it is pretty obvious.
Oh sorry to get your hopes up. At 5 weeks I doubt I could tell by a photo. I thought Markie was hatched in mid April like mine & still not showing any male traits.
Your Markie looks about the size of my 8 week old female (but with a better tail & crest).
At 6 weeks my males had tiny wattles that looked red. They also had some pink/red where the comb would grow - especially when hot.
And my female had none.
*The pics were from my early March hatch, but I kept detailed photos in hopes of using them to sex future birds.