Great items for chip collectors !!!

K583VS1 - Gold Ceramic Planar 48-pin body universal 8-bit CPU (I2L, Integral factory, 1981, Military). 

 
Extrimely RARE USSR Series 583xx - 

583-series, produced by an integrated-injection technology (I2L), is intended to build a wide class of computational tools from MCUs 
to high performance information processing systems of wide application.
Kit focuses on an arbitrary command system and allows you to create a computer with a bus-modular design, simulate any command system.
Microprocessor kit is characterized by high computing power, a fairly high speed.
Electrical parameters of the IPC 583-series are compatible with standard TTL series, there is also fully compatible series K583 and K584.
An example of the series - inertial control system missile defense complex 51T6 A-135 (BTsVM Argon-17). 
 
NO a FOREIGN ANALOGS !!!

583VM1a, K583VA3, K583HL1, 583VG1, etc. 

CPU like NEW, OLD STOCK, in working order.