The U800 series of 8-bit CPUs were manufactured in the East Bloc. The series does include a couple of 16-bit CPUs, too.
This 8-bit CPU is a Z80 knock-off.
This Z80 knock-off started production in 1979.
This is a clone of the U880D.
U880, U880D Edit
Manufactured in DDR, these Z80 knockoffs started production in 1981. The U880 ran at 2.25 MHz.
U880A, UA880 Edit
Thee are East German clones of the Z80a.
Where was Z80a clone produced?
This is one of the East-blocks 16-bit CPUs.