Luftschutzsirene.de

http://www.bunkertours.de/Frankreich01/ ... orient.htm

I think must be an old L141

Yes, L141 is possible. Unfortunately the siren is hidden behind the grid.
But it is also possible that this is a S4. Some of them have the same shape at the foot.

The original L141 was the only siren with a grid like the one shown on this website. By the way: Great find!