It seems to me that another kopeck with a cross was stamped on the cheek, what date and mint and what happened.
it is an alignment of the medal with a slight shift to the left by 10 degrees, the number at the end is 4 and before it 3 or 5 ( 1734/1754?)
the weight is 3,45 g, size 20,60 mm and thickness 1,80 mm I think it's bronze like copper.
https://en.numista.com/catalogue/pieces17730.html

How will anyone advise?