That the 50th anniversary was really the piece that kicked off all of the modern Fifty Fathoms models that we see today. A total of 150 watches were made back in 2003 in 3 series of 50. Series 1 was sold in the European market, series 2 was sold in the Asian market, and series 3 was sold in the Americas. It was also the first watch ever to incorporate a sapphire bezel.