In the meantime i have more than 25 se.no. of Zetas. All of them begins with "8". Some have 6 numbers, and start with 820xxx or 890xxx, and the most have 7 numbers start with 82.., 83.., 84.. or 85.., but the most of them with 830.. or 831...
;aybe these are the years and the running series of the year, as the 3. number is in every time 0 or 1.
But what are the 89... numbers?? I don´t believe, that there was any production in 1989.
The third and second last number could be a running number, as this rises through the whole line...
It was a nice play with the numbers. At the time i had 2 of these nice tonearms i wanted to know if there is any system behind them and how many items were produced. But i have to admit, that i know not more about these things than 10 years ago... :-)
But enjoy these arms, maybe with Kiseki, some Ortofon (Rohmann, Jubilee) or even with Dynavector or Decca/London cartridges.
What do you use, Mdpsk?