Some questions about a bass

[Fernando González]

Hello,
I have a bass labeled.....


I think Jean Cavalli isn´t the maker but the dealer. I suposse thie dealer entrust instruments to a maker probably not so distant.
This is the bass...





Do you think it´s German or French? Probably the neck isn´t original.
It has also a lengh string of 108 cm. (nearly 43"). I´d like to shorten to 42 or less. Here in Spain people doesn´t like so long. Any ideas for making this change? May be a extended nut was enough or even move the bridge. Any advise from the masters, please?

Thank you