I think this is your watch - and also in pink gold... I am pretty confident about this given the size of your watch...
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It houses the smaller cal. 361 opposed to the larger Cal. 30 T2 which was used in similar case design.
Here is the similar OT 23
72 which has a 30 T2 SC (center second) inside
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Should your watch house a 30 T2 instead of cal. 361 this would be a different story then and most probably a different ref.
You will have to have it opened by your watchmaker for exact determination - take photos of the movement and the inner case back then and show them here.
hope this helps
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