Help me identify an amp

Wow. Now that is one old amplifier. 

Fantastic, thanks to everyone for helping! He often mentioned Dyna to me (we were also both interested in Sunn bass amps, which are based on a Dynakit design). Is the ST70 something that was sold as a kit? He may have assembled this himself if so. I will try to open up the chassis later and see if the PCB has any marks on it. 

The ST70 was sold as a kit and also fully assembled.  The tape labels suggest DIY.

The PCB is not a Dyna but may offer a clue.

While I’m at it, I may as well ask my next question: what is it gonna need to get up and running again? It certainly hasn’t been used since 2012, probably even longer.  I know electrolytics fail with time. Given the usefulness (not to mention sentimental value!) of the gear, I will definitely want to take it to an amp tech for restoration. What should I anticipate needing to do?

The best person to ask would be Will Vincent. Search the name on USAM to see some of his modified amps and to get his contact info.