Hi All , I'm new here and looking for some advice please.
I've recently decided to start collecting chronographs ,although I'm a long time watch nut, and have been looking for an early Autavia . I've found this one on ebay but even to my untrained eye it has a lot of differences when compared the the models illustrated on OTD , case doesn't have the chamfered edges to the lugs , signed crown , wrong bezel/insert ? .Am I right to be wary or are these just factory variations ?.

T.I.A. for any help,
Ron