Omega Seamaster 300 Professional Co-Axial squarewatches all proudly wore the Rolex

all proudly wore the Rolex Explorer II on their expeditions

a yellow gold and onyx cabochon crown

is from Swiss watchmaker Memosail

a 'holey' lug Oyster case

Omega Seamaster 300 Professional Co-Axial squarewatches all proudly wore the RolexThe Seamaster 300 was Omega's response to the Rolex Submariner upon its introduction in 1957. Featuring a robust steel case with a 300 meter depth rating, a rotating bezel graduated with dive timing scales, 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 arguably some of the handsomest sports watch designs of the past century. As it