Stogi prototype 1982-1985
This model of Stoge tonearm was made only for domestic market- it was never exported. The ball bearings and cable wiring are much inferior to Stogi made since 1986. Stogi tonearm ( much higher price then prototypes) since 1990 is similar to current production model in 2017.
We do not recommend to buy old second hand Stogi prototype made in years 1982-1983 ( silver inner frame ). Most likley are damaged ball bearings which can not be repaired or replaced. It might be ok for use with cheap cartridges.