WWII Austro-hungarian whistle + pin?

[levaid]

Hello Guys!

The whistle and the pin came together. The pin was attached to the lanyard. The pin is marked R. Schanes - Wien 13. Front: D, T and C-s or O-s under the ribbon.
The whistle's shape and the lanyard looks WWII german to me, but I have never seen this metal version.
The pin is obviously austrian.
Do they belong together? Could you help me to clear this issue?

Thank you!

[lokvar]

Hello.
The whistle could be from WW1, i have found some similiar.
But the pin is between WW1 and WW2.

Greetings
Sašo

[levaid]

Thank you very much!