I wonder if there is a resource out there to see what the 1970 rulebooks said!
I'd contact USFSA, they may be able to help you figure out what was on the test back then, or at the very least they will be able to look up your membership information including any tests passed and the dates and provide you with your membership number so all of that will still apply towards you now when you rejoin. They did all that for me, even though I am not a current member (and it only took a couple of days to hear back, too - I think technically the membership secretary of any club can look this up too). If nothing else it will assure when I re-join that I get signed up as the correct person, since I also currently have a basic skills membership under my married name.
Anyways, the test requirements for pre-bronze are really basic and the jump requirements are not as specific as for the standard track tests:
TR 32.09 Adult Pre-Bronze Free Skate TestThe purpose of this test is to encourage beginning adult skaters to learn the
fundamentals of free skating. No great deal of technical ability, carriage or flow
is expected. The candidate must show knowledge of the elements, fairly good
edges and some evidence of good form. The following technical elements are to
be skated individually, without music.
Jumps: Two different jumps, either one-half or one full revolution
Spins: 1. A one-foot upright spin (minimum 3 revolutions in position)
2. A two-foot upright spin (minimum 3 revolutions in position)
Steps: 1. Crossovers — forward and backward (either direction)
2. Lunge or spiral
Based on that I think you can pass that one easily, which means you can "skate up" to bronze in competition before or while you are preparing to test that level. I plan on testing through Bronze just so I can compete in Silver - I doubt I'll ever test through Silver FS or want to compete in Gold. I do plan on testing Silver and Gold moves at some point though.. I'd like to eventually get all the way through Senior.