Any ideas on this stamp mark?

[Jack]

Hi guys,

Here is a real challenge: What's the inscription of this stamp mark? Unfortunately, this type of wrapping paper and stamp ink don't get along with each other. So there are some "ruins" only.
I guess the ending ist something with "-amt (office), perhaps -(ersa)tzamt?
But i don't have an idea what office could have stored patterns of HJ clothing.
Any ideas are highly appreciated. Thanks!

The date is April 1940.

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[Garry]

As this is a Muster my first instinct would be that this is the MPA (Materialprüfungsamt) at the RZM?

 

[Jack]

Great idea, thank you Garry
Silk paper and lettering - especially stamp marks - do not go together .
The indelible pen looks like a hand axe ;-).