This was probably not the chronograph from Universal Geneve that you were expecting as the Aero-compax is not currently among the most coveted models of this brand. Hell, this one does not even look like an Aero-compax, neither featuring the 4 sub-registers of the first references, nor the external bezel from the later ones in the 1960s. However, there is nothing fishy here, you are just looking at the reference 22704/3, also classified as an Aero Compax Type B. However you call it, this chrono has a lot to root for: a great 38mm , a blued handset, and unusual numerals on the dial. Granted, the movement is not in-house, it is nonetheless the famous Valjoux 72 that you can also find in the vintage Rolex Daytona. This watch even comes with a Universal Geneve bracelet, and a blue Nato for a stealthier look.
You can find this early Aero-Compax offered for 7,500 Euros or around $8,300 here. The dealer MentaWatches is also offering a later version – the reference 890101/01 with 41mm and the 24-hour bezel – for $9,500 here.