Officers generally had to buy their own uniforms, so most were tailor made (and marked) rather than "issue" quality. (But there was a war on, and some NCOs had money, so you will see some variance both ways)

looks like a Luftwaffe survival flask

Welcome!  You are in good company- We are all "still learning" in this hobby- so my advice is to get to some shows and inspect and handle real pieces from reputable dealers, always gather as much information as you can from several sources (books, forums, web, collectors) to help make your own decisions, and never stop learning!

Does anyone have a source for 11 mm German?  

Thanks a bunch! 

Hi everyone,   I’m Elias Harker, and I’ve recently started diving into the world of collecting rare WWII artifacts. There’s something incredibly exciting about holding a piece of history and imagining the stories behind it—it’s like a direct link to the past.   Since I’m new to this, I’m still learning the ropes, especially when it comes to authenticating items and understanding their full context. If anyone has advice or tips, I’d be so grateful! Honestly, I’m just excited to connect with others who share this passion and maybe swap stories along the way.   Looking forward to getting to know you all!

Yes, and a bunch of really great guys as well. Here is an interview we did with Chris at my museum in 2022.   Scott               

Thank you! I passed it along to my friend.

A War Merit Medal & "Luftschutz" Medal ribbon bar, a common civilian combination.   Source:   https://www.dracomedals.com/germany/nazi-germany-3rd-reich/nazi-germany-ww2-war-merit-1939-air-defense-meritorious-service-medal-1938-ribbon-bar-german-decoration-1945.html  

Those are wild uniforms.  Thanks for posting them!

In general officers visors were a higher grade of material and construction.

Cool, they're pretty big right...