Item 92 of the Heuer 100 is a "Big Sub" Autavia, with "Thin Lume" hands and the red chronograph second hand. The serial number is 48868, which is consistent with others that we have seen with these features.

Here's a link to the Heuer 100 listing, where you can see more photos -- https://theheuer100.com/product/heuer-autavia-3646/

Got to say, this looks like an original / survivor sample of one of the most coveted vintage Heuers. This estimate is $25,000 to $50,000; this is a wide range, but is understandable in view of the fact that we have seen very few of these sold publicly.

What do you think of it?

Jeff