Verification of Seamaster DeVille 135.020

Hi everyone!
I’m new in the watches world and looking for vintage Seamaster DeVile. I found on chrono this one https://www.chrono24.pl/omega/omega…solid-gold-1963s-135020-sc-62–id34785776.htm and wondering if it is possible that ref 135.020 was made fully from solid 18k gold? Full ref on the envelope is 135.020 SC-62, but i can’t find anything (with that reference) that doesn’t have a stainless steel case.
Thank you in advance 😀
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