The present “El Primero” is one of only 25 prototypes produced of Zenith’s reference 1205SP with triple calendar and moon phases. Scholarship believes that less than a handful of these watches have survived.This series is powered by Zenith’s calibre 3019PHF and was completed between 1969 and 1970. They are easily recognisable by the star numerals positioned at the 2 o’clock and 10 o’clock positions, adjacent to the week day and month aperture. The present example, preserved in excellent and original condition, still features the original Zenith’s bracelet made by Gay Frères, stamped 1/69. To some this watch belongs either in a museum or in an important private Zenith collection. We believe it could also look stunning on someone’s wrist.
A very rare and fine stainless steel full calendar chronograph prototype wristwatch with moon phases and Gay Frères bracelet
Case, dial and movement signed
The case is in very good overall condition with great definition to the bezel and bevel on all four lugs. We believe that the watch has only seen one polish since new. The dial is in original condition and the luminous on all numerals is in our view original too. The dial is overall in excellent condition and displays only one area of surface wear (around the 8 o’clock hour marker and outside on the tachometer scale). The movement is running with all the calendar indications and the chronograph functions performing correctly. The movement is in excellent condition and displays hardly any wear to bridges and screw-heads. Given the overall condition of the watch it is possible that it was never serviced since new. The steel bracelet (with expandable flip lock clasp) is in very good condition and measures overall up to 202 mm.