I just got that set in as a trade - Feuerschutzpolizei (Fire Protection Police) Wachmeister Shoulder Boards and Collar Tabs.
Shoulder boards are not a pair - one is shorter than the other (11.5cm vs. 11cm) and button strap is slightly different as well color brightness.
From my research similar style but slightly different color was used post-war by BRD.

Any feedback is appreciated.

Thanks.