Help identify the IC manufacturer: is it really possible that these ICs from the 60's just made a comeback (К155ИД1)?
The chips that you have are made in Belarus by a company named Integral.


К155ИД1 1814 :- This is a recently manufactured chip. (i.e. 14th week of 2018).
К155ИД1 8910 :- This chip is very old (i.e 10th week of 1989).


Link to the site of manufacturer.

Yes, it might be possible that the manufacturer is using a slightly modified architecture based on the previous one for the manufacturing of these new chips