Can anyone identify Omega 18K rose gold buckle/strap

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16mm suede strap with 14mm buckle, which has Omega logo on top, marked 750 and swiss and 18K, plus some kind of logo that I don't recognize, and appears to be rose gold.

Would this be for a specific model? With the sizing, not sure if it would mens or ladies ?
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some close ups, sorry for the mediocre pics (last pic also shows another Omega strap with yellow gold plated buckle)
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