It is a big module rater than a chip really . Used by Audio Aero , Audiomeca , Nagra , Camelot , Talk Electronics and handful of other manufacturers in the beginning of the century. I know there are two of those modules on the big site. Both in Russia, both earlier MK I and both priced to attract buyers form United Emirates .I know there must be a supply of MKI versions since a lot of buyers of those early machines upgraded to MKII chip when it appeared. I'm interested in either version. TIA , L