Omega Ref. 2850 Crown: Vintage Replacement Advice

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Looking for Omega 2850 1956 Olimpics Melbourne replacement gold crown.

 
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069SX42019 This possibly? Have a search on eBay or google I picked one up for my constellation a while back and think they use the same crown. its a 10 sided decagonal
Second photo isn’t correct
 
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The one I’m looking is hexagonal. Currently, she has a regular, genuine Omega.