There is a 2446c bezel on ebay, but I am unsure of which execution it is. It was listed for $800 but didn't sell. https://www.ebay.com/itm/Vintage-Heuer-Autavia-2446C-GMT-Bezel-/153396838873Purchases made through these links may earn this site a commission from the eBay Partner Network
whoops - that's true, but that's the only one I think of when it comes to the 2446c - probably because it's a grail of mine.