Help with unidentified visor cap: Possibly fielgershaft?

Can anyone identify this visor cap?? Has black piping and it’s Luftwaffe blue gray color. But the cap band is the same color as the body. Even early luftwaffe had a mohair cap band.
and it’s not RLB either. As far as I can tell RLB doesnt use black piping.Any ideas. thanks

http://www.militaryrelics.com/Auct64/Headgear/E-140.jpg

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