The Zenith El Primero Striking Tenth limited edition is without a doubt, one of our favorite chronographs out there and one, that you rarely run into. Released in 2010 in a limited edition of 1969 pieces in stainless steel or 500 pieces in 18K rose gold, its case measuring 42 mm, features the traditional faceted straight lugs of the iconic El Primero chronograph. Christened 'El Primero' —meaning ‘the first'— and presented on January 10th 1969. Its exceptional performance made it possible to develop and launch two calibres, the '3019 PHC' for the chronograph with date and the '3019 PHF' for the chronograph with triple date and moon phase.