D'oh. You're right. It's gold-capped. I even own one of these and should know better.

 

There's lovely sparkle dial day/date for sale on the forums too: https://omegaforums.net/threads/reduced-1450-vintage-omega-seamaster-sparkle-gold-capped.150968/

 

With bracelet as well!

 

Everyone should have a sparkle dial in their collection!

 

Love it! Is this watch gold-capped or 18k?

 

Thanks! It's gold cap