Omega solid gold case

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Hi Everyone,
I recently purchased a 9ct gold 1970s omega (see pics). My question is; would the case & Crown be solid gold too if the caseback is signed 0.375? There's also a lettering on the crown that I'm not sure what it means (see pic). It's a Cal 1012 Genève.
Kind regards,
Chris

 
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Probably not the crown, but the case and case back should be gold. Lovely watch, mine says hello.
 
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Agree. The case yes. Crown would be gold cap or plate.
 
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Agree. The case yes. Crown would be gold cap or plate.
Thank you. Would 17g be considered heavy gold content of the watch case minus the movement and strap and crystal?
Yours looks amazing