What sort of markings does this felt have?

[Andy be Prussian]

Hey guys. First off, big thank you to AOK and responding to my questions about shipping. I had to hold my breath a bit, but it finally arrived yesterday. I’ll definitely post this in my ersatz thread soon.
So onto the topic at hand. This rolled edge thread has a very unique makers mark in the liner dated 1915. I’ve studied it quite a bit on AoK’s website and at hand and it’s still hard to read. I’ve looked up helmet makers on pickelhauben.net and didn’t see any that resembled this one. Best I can guess is “Lilbem Brands”?
Also, there’s an ink stamp on the liner that I’m positive is “gb.” I’ve noticed it on a few ersatz models including on a clothed covered that was posted here and a few steel ones. Is it an approval stamp similar to the ones you may find on steel helmets. All guesses and discussions are welcome here. Thanks!

 

[CLOVIS 57]

Beautiful helmet,
it’s written in Sütterlin. Silber & Brandt.

 

[Lars13]

Congratulations, nice helmet.
The "g" in "gb" stands for Garnison, and the "b" means it is the second grade, so this is a second grade helmet (even though it looks very nice in my eyes) usable in the garrison only (apparently there also was a "ga" for first grade garrison items).
Regards,
Lars

 

[CLOVIS 57]

Félicitations, joli casque.
Le « g » dans « gb » signifie Garnison, et le « b » indique qu'il s'agit d'un casque de deuxième catégorie (même s'il est très beau à mes yeux), utilisable uniquement dans la garnison (apparemment, il existait aussi un « ga » pour les articles de première catégorie de la garnison).
Salutations,
Lars

Completely agree Lars, Voici un « GA »

 

[Andy be Prussian]

Thank you for those answers!