The delta sets used plain 9-90 there was a 9-90 01 that
may have been for late deltas. The EFL sets & 13GC10
used the pot on board prob the -02 & -03. Someone has
the CRSP for modules that will answer the question.
35 yrs ago I could have rattled all this off along with the
list prices. A mind is a terrible thing to loose.....
73 Zeno