Official badge of the rank of the Russian police, XVIII century

An extremely interesting find of our store is the official (?) a policeman's badge (?) rank 2 parts (apparently, the police) of the Russian Empire. Unfortunately, the history of the Russian police of this period has been studied rather incompletely and has many white spots, one of which, apparently, is this sign. There is no doubt about the authenticity of the item, it is made of a thin sheet of brass, with an embossed inscription "2 parts". It should be noted that the font and the style of the inscription do not leave any doubt about the dating of the subject in the second half of the XVIII — first third of the XIX centuries. We will be grateful for help in the exact attribution of the item. Size 81*95 mm. Brass, remnants of gilding. Guarantee of authenticity.