Made by Angstrem (Ангстрем) plant, Zelenograd, ussr in 1992
"ОП" (Опытная Партия) means "ES" (Engineering Sample)
These soviet Z80 clones were renamed to standardized 1858BM1 later
80A-CPU MME is Z80A clone too. This chip goes like a bonus.
Made in ussr using East German MME crystal.
Will be packed and shipped carefully (by airmail, with track# ).
Please check out my other items to find more collectible CPUs