Oris Watch Aquis Date Cal 400 01 400 7790 4135-07 8 23 02PEB. Meet the Aquis Date Calibre 400 43.50 mm. Oris created it to be the watch that goes with you everywhere you go. Think of it as your luxury everyday toolwatch. Take it on an adventure. Slip it under a cuff. And it’ll make you smile every time.