This is the badge (5.5cm across) introduced in 1882 and worn untill the abdication of the Tsar in 1917 in all line infantry and rifle regiments on a low crowned lambswool kiver. The other ranks version would have been a more robust product in die-struck gilding metal; this has a gilt finish.

This die-struck gilding metal badge is obviously intended to be worn on a cap, or possibly a lapel, because of its small size (3.5cm high). I am working in the dark, but I am guessing it is for a postman because of the motif of the hunting horns with the electrical arrows (telegraph).