The Gambato Gran Sport series are a set of Argentinian 'derivatives' of classic Campagnolo models. The oddity is that they seem to date from the late 1960s to late 1980s, whereas the original Campagnolo derailleurs date from a decade (or two) earlier. It seems that the designs got lost in some kind time warp - perhaps in the boot (trunk) of a DeLorean.
It’s as if the 1960’s never happened in Argentina - perhaps they didn’t.
This, unlabelled, derailleur shares all its components with a Gambato Gran Sport, except for the outer parallelogram plate. The symbol on the outer parallelogram plate is eerily similar to the stylised flying bird logo used by the airline Lufthansa (in fact it appears to be a direct copy). Lufthansa's logo apparently depicts a Crane and was designed by Otto Firle. It may or may not be relevant that Shimano's most upmarket derailleur in the 1970s was called the Crane.
If anyone knows of a bicycle brand or a bicycle component brand that uses a logo like this, please let me know. Until I learn otherwise I am going to consider this derailleur to be a Gambato product. Its features are:
Finally, I am proud to say that this is one of the rustiest derailleurs in this collection. The b-pivot bolt is firmly rusted into the position shown.