Welcome here!
During the 60's and 70's JLC provided watches/movements to several brands such as Fabre-Leube, Gübelin and GP.
Often the movement was reworked by the barand, some more, some less...
I have no info on numbers - please check between the lugs at 6 or inside caseback.
There should be a reference number. With that it would be easier to ask for information.
Best
Blomman