Besides the classical „Fliegerchronograph“ my preferred IWC. You can wear it and forget it. Like a Sinn U1, a Panerai Submersible or Base Logo. You need at least one of these tool watches in your collection!
My absolute favorite! And a truly nice story about your spontaneous acquisition. Sometimes you just have to be at the right place at the right time. Lucky guy ;-))
My chrono of choice too. Though I am still searching for an adequate custom made leather strap … nearly impossible because of the proprietary end links :-(