These are WG (white gold) cufflinks from PATEK PHILIPPE. I purchased them about 10 years ago from Time Tunnel, a pre-owned watch specialist. At the time, I often wore shirts with double cuffs, so I intended to match them with a WG Calatrava 3796. However, when I actually wore them, the brilliance of the WG was so dazzling and eye-catching that I felt they were unsuitable for business settings. I only used them two or three times and then put them away in the box. While the price would likely continue to increase if I kept them, there's no point in holding onto them indefinitely like a financial product, so I've decided to put them up for sale (I will not negotiate on the price). The diameter of the cufflinks is 19mm. The product came in the paper box in the lower right of the photo, and a dedicated storage case was also included. I haven't used this case, so it's been stored in new condition with the blue film still attached.