1960's Omega Seamaster DeVille

Here we have a 1960's Omega Seamaster DeVille. This is a top loading, steel case, measuring 34mm in diameter, 18mm lug width. The markers and hands are a rose gold color, dial is a pearly silver color with the brushed sunburst pattern. It keeps excellent time, but I do not know the service history. The crown does not have the Omega logo. The watch shows some age, but overall in clean and good condition. I'm asking a very reasonable $450 on this one. Ask me anything and check my references. Thanks for looking.
Matt