You should find some informative brochure d/l's in the Specs and Docs section on this site.
Basically, the very first E-35 was a recycled Alberg design, in the late 60's.
The long production run King-designed E-35-2 went from early 70's to '80 or so. This model has become a veritable classic yacht.
Then a totally new King-designed E-35-3 was produced in the early 80's, until ??.
All seem to be well-regarded for construction and sailing ability, FWIW.
Loren