Help with identification of denga(?) [решено]

Hello dear friends, I have this coin that I imagine is from the Russian Empire. I acquired it as being 1/2 Kopek from the reign of Ivan IV `The Terrible` 1530-1584, but I do not know if the information is correct. I am very grateful for your attention and help. 16x10mm.

Looks like something similar to this, but it is hard to say anything from such photos…

http://www.a-saida.jp/spravki/silver-copeck/8019/01.htm

I would offer it.

thank you so much!