Ulysse Nardin Chrono triple date with zenith el primiero movement, circa

Rare Ulysse Nardin Chrono triple date with zenith el primiero movement, circa 1980. Watch is in good condition, measuring 39 mm and is Yellow gold, comes with UN YG tang buckle. Domed crystal. Watch is accurate to apprx. 2 min a day. Good power reserve. Calendar functions as it should. Chrono works well. Moonface does not work,( if anyone ever looks at it), still looks nice on the watch. Comes with paper from UN, stating that it is indeed a vintage UN watch. 3 day return if not as described. US 4,900 OBRO, shipped in US.