What is this font (architecture)?

Question

Fonts

Help me find the font, it's a clipping from an architectural drawing (printscreen from youtube), a Gost lookalike, but not it.
Autocad's Isocpeur is also different.

Answer 1

It looks more like it was done on a computer, and not by hand on paper:

Answer 2

I have no idea what it's called, but it's a built-in AutoCAD font.
If sclerosis fails (the last time I dealt with him a few years ago).