These pieces, especially from Patek, rarely go under the radar, vintage dealer Ignacio https://www.modexx.co.uk/ Coll of https://www.xrelojes.cz/ Ancienne Watches in Barcelona told me. I reached out to Coll because he posted a video https://www.hosxx.co.uk/product-category/tag-heuer/ where he traveled to Madrid to inspect and bid on both the million-dollar ref. 2497 and the 96.