French lock with Triangular Drill Pin & Key?

hello,
I hope that I am not annoying the forum here with my recent flurry of questions, it just seems that coincidently some mysterious locks have found their way to me in the last months.

This is a French lock with a triangular drill pin and corresponding key (which I believe is original).

Might anyone know the approximate age of this lock?

My sincerest thanks to anyone who can help.

please help.

Thanks

I didn’t find the right solution from the internet.

References

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