First off, this was wonderful, Jeff. Many thanks for writing and sharing it. My observation about the increase in prices of just about any model made by Heuer is that it is fairly recent, and seems to have come on the heels of an early Autavia sold at auction by Antiquorum for $24,000 after previously being sold for $3500. Rather than the Haslinger auction held by Bonhams a few years earlier, this seemed to be the demarcation point for increasing prices.