Hi you guys. I’m a newbie on the list. I have my dad’s UG Aero-Compax chronograph, circa 1940’s, gold with a fixed gold wire band. It works, but probably needs some cleaning. I’m attaching some pix. I don’t think it was ever worn much. You all seem to have a lot of expertise in these areas: what can you tell me about this watch? I haven’t found one like it yet online to compare. Thanks a lot in advance!