Today, I just entered the Omega world as I got a nice watch for my wife a: Specialities' Aquarella ref. 5779.71.56. This model is very nice (sorry for horrible picture taken with cellphone), S/steel box paved with diamonds, mother of pearl dial, with diamonds and yellow stone (salesman was unable to tell whether these were yellow diamonds or others)....?

Jeff
Thank you both for your answer. I realized that i cancelled by mistake the small introduction of myself i wrote in the post, so sorry about that.
thanks Grumio for your the information, I could not find it myself, but that's perfect !
Thanks again !
Jeff