I mean the ones from 1958 to about 1970. Not including that transitional period just prior to the std. 39-2. Thats a whole other
study. Im working from observations, SDRs, and 39s for sale.
And Sns. I have recorded. The highest four digit I have is 8000.
Then it seems to jump to 30,000 then 60,000 and finally 80,000.
Please help me out and just contribute with Sns. Im not an
expert, just an old guy whose Dad got one as a gift from a patient back in 1959. Im no expert, just a student who has observed and read. Im also self-quarantined down in FL. They closed the bars up at the beach and closed the top-less beach at the north end of town. Mike