Great items for chip collectors !!!
 
5x Ultra RARE Russian Soviet CPU Gold Ceramic Clone of Intel 8251 (8080 support) IC. MADE IN USSR.

This auction of 5 Rarest USSR Soviet Russian ICs:

K580IK51 - Extremely Rare Russian Gold Ceramic Planar 48-pin (Kvazar plant, 1981)
580VV51 - Rare Russian  Gold Ceramic 28-pin (Kvazar plant, 1984)  
 
KR580IK51 - Rare Russian Plastic 28-pin (Kvazar plant, 1982)
KR580IK51 - Rare Russian Plastic 28-pin (Rodon plant, 1985)  
 
KR580VV51a - Rare Russian Plastic 28-pin (Rodon plant, 1991)  
  
K580IK51 - the 1st USSR made clone of the Intel 8080 support,
BUT!!!
it has 48-pins and planar body as distinct from Intel 8251.
 
K580IK51 was later renamed to 580VV51 [new IC State Standart] and later with (A letter as Intel A) 
and was re-designed to 28-pin CerDIP body, even later it produced in plastic body [KR prefix].
  
For more information, please visit - www.cpu-world.com/CPUs/8080/MANUF-USSR.html

Great item for chip collectors !!!

IC from the Old Stock, in working order.