Luftwaffe flight NCO cap real?

[Matteo]

Dear friends,

I would like to ask your opinions about the originality of this luftwaffe NCO cap, piped yellow for flight units.
The insignia seems to be made of zinc and it is marked inside Schellenberg.
Also any idea of the value?

Cheers,
Matteo

[Matteo]

eagle detail:

[Matteo]

cockade detail:

[Matteo]

.

[Matteo]

maker mark detail:

[Matteo]

under the sweatband:

[SgtB]

Looks like a winner, Matteo!

Officer-Quality cap with lower grade badges. Great shape. Early.

Prices vary so much from place to place, but $400-450 U.S.,
would be fair both ways.

[Matteo]

Thanks Brian for your input!

Matteo