Omega Seamaster 300 Professional Co-Axial ladies like the 7413-3

like the 7413-3

likely designed as a sports or regatta timer

specifically those of Pan American Airways

especially when driven by manual-winding movement which allowed the cases to be slightly thinner

Omega Seamaster 300 Professional Co-Axial ladies like the 7413-3The original 1957 Seamaster 300 was Omega's response to the Rolex Submariner. Featuring a robust steel case with a 300 meter depth rating, a rotating bezel graduated with a dive timing scale, and a metal bracelet with diver's expansion links, the early Seamaster 300 was not only functional a diver that would go on to see use in Her Majesty's Navy, but is also arguably one of the handsomest sports watch designs of the past century. As it evolved, the