This auction of 4 Rarest USSR Soviet Russian ICs - clones of Intel 8255 support IC (parallel peripheral interface):

1) K580IK55 - Extremely Rare Russian Gold Ceramic Planar Gold cap (Kvazar plant, 1979) -  
 
This is the 1st USSR made clone of the Intel 8080 support,
BUT!!! it has 48-pins and planar body as distinct from Intel 8255.
 
K580IK55 was later renamed to 580VV55 and was re-designed to 40-pin CerDIP body

2) KR580IK55 - Rare Russian 40-pin (ElectronPribor plant, 1982, Pilot batch - letter "O")
3) KR580IK55 - Rare Russian 40-pin (Kvazar plant, 1983)
KR580IK55 was later renamed to KR580VV55a

4) KR580VV55a - Also Rare Russian 40-pin (Kvantor plant, 1991)

For more information, please visit - cpu-world.com/CPUs/8080/MANUF-USSR.html

Some history :
 
580 was one of the most widespread microprocessor sets in Soviet Union in the end of 1980s. 
A lot of computers had been created on the base of 580: 
personal ("Magik" , "Irisha" , "Mikrosha" etc.), 
general purpose ("SM-180x" , "ES7970" , "Electronika-K1",  "Iskra-226" , "Radio-86RK" etc.), school ("Korvet" etc. ).

Monocrystal microprocessor 580IK80 is the basis of the set,  
it has 16-bit address bus and 8-bit data bus, as Intel 8080/8085 and Zilog Z80 processors, 
and is compatible with them by command set and machine code. 
Thus, any software written for 8080 can be run on KR580IK80. 
Furthermore, KR580IK80 has 40-pin package identical to 8080 and can be used in 8080 mainboards 
(Earlier version of the processor - K580IK80  - has 48 pins and is not compatible with 8080). 
A model of this microprocessor called 580IK80A (later renamed to 580VM80A ) is analogical to 8080A processor.
 

580 series includes a large number of chips that allow simple connection of 
different devices and maintain effective data exchange between computer parts:
 
580GF24 - clock generator (8284 analog, 15 pins)
580VK28/38 - system controllers (8228/8238 analogs)
580VG18, 580VG92/92A - system controllers for different bus types (28 pins)
580IR82/83 - latch registers (20 pins)
580VA86/87 - receivers/transmitters (20 pins)
580VI53 - programmable timer (8253 analog, 3 channels, 24 pins)
580VV55/55A - parallel peripheral interface (8255 analog, 3 channels)
580VV51/51A or 580IK51/51A - serial peripheral interface (8251 analog)
580VN59/59A - priority interrupt controller (8259 analog, 8 interrupt request inputs, 28 pins)
580VT57 - programmable DMA controller (8257 analog, 4 channels, 40 pins)
580VG72 - floppy drive controller (8272 analog)
580VG75 - CRT display controller (8275 analog)
580VV79 - keyboard controller
580VK91/91A - system bus arbiters
580VT42 - dynamic memory controller

Great item for chip collectors !!!

ICs from the Old Stock, in working order.