I’ve recently seen this appear on WeChat. It appears to be a tungsten (some alloy) case for a Daytona that’s then plated/wrapped/melted(?)… here’s what the guy on WeChat said:
“Fourth generation of melting gold technology, not gold wrap, gold one layer on the case, no drop skin, no color difference, after the original color matching. The weight is exactly the same.”
That’s not a translation, he wrote in English, so it’s not like I can post what he wrote in Chinese and we can get a better translation.
He said that a full case, clasp, and oyster bracelet would be ~20,000CNY ($2,800 USD). Which seems both expensive and cheap compared to the cost of a custom full gold cnc case.