F50 Jubile Chronograph 1 of 50

Anybody knows something about this watch? It is definitely an original product due to the degree of detail it has... but everything i read on the forum is that there are different watches for the F50 that are more known. The resolution is not so good but on top it says 09/50 and on the back F50 Jubele Chronograph. The wristband has embossed a Cavallino and Since it says F50 Competitizione on it could it be for a limited amount of race purpose built F50s? On the glass cover it looks like K&K (second K is mirrored) But i didn't find any manufacturer with this name.
Don't know... never heard of it.
Thanks for input...
Regards
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