police tschako with parade bush and question

[schnurrbart]

dear friends

after hours and hours spending my time for searching all around the world this day my new parade bush from the music corps came across.Buffallo hair .Please enjoy the pics. Now my question...for fixing on the knopf 91 how is the correct way?
Is the a mounting plate outside or by my way with a sling
thank you tom

[SteveR]

Nice find.

[steiner68]

Nice catch !