Vintage Stopwatch SLAVA Soviet Chronometer Mechanical (Split Second SDS-pro)
Duration of a full turn of the hands of the stopwatch SDS pr-1-2 Technical characteristics of the SDDSpr-1-2 stopwatch The average error of the SDSpr-1-2 stopwatch at a temperature of (20 ± 5) ° C in 30 minutes 0.4 s.