I used this flash back in the early 1970s - it was one of the first of the bigger automatic flashes. I found it a real workhorse, but it had one feature I sometimes found limiting. Unlike newer automatic flashes, the 202 would dump the unused energy from the capacitors on every flash. So instead of using just the appropriate amount of energy required (as determined by the "auto" sensing circuitry) it threw away any excess. This meant every flash recycle pulled a "full" charge worth of energy from the battery.
The next model in that line, the Metz 402, if my memory serves correctly, did save the excess energy thus giving more flashes from a fully charged battery.
But, if it is what is available, and it actually works (old capacitors may be an issue) you may find it a useful tool.