Macro Plexus Hybrid Key System

[c64man]

Found this bad boy today on craigslist,  just had to go pick it up.  Its a Macro Plexus Hybrid KSU.  16 extensions expandable to 72,  8 incoming CO trunks.    If anyone needs phones for something like this,  I have plenty,  I mean plenty.   Its going to replace the Panasonic 308 for now until I get the step switch built