Looks mid 70's. The first Hitachi SS sets had an
odd vertical chassis that came out in two chunks.
Each had modules. Seemed like every model used
a different chassis.
Next generation apx late 70's was a non modular
flat chassis with a overly complex power supply
we all hated. After a few yrs they dumped that
& the sets were easy to deal with.
73 Zeno
