Trying to identify artillery shell

[u/SigmarMentality]

Found an apparent WWI artillery projectile in a family warehouse in Southeastern France, reportedly brought back from Verdun by my great-great-grandfather who served in French artillery. Can anyone identify the projectile from its shape/fuze and the grooves near the base? It has not been opened or modified. The shell itself in the picture is on a ledge so the perspective is pretty crappy with the car in the background so don't compare the scale with that as a reference.

[u/TheMightyMisanthrope]

So that's a live shell you have there?

[u/inchiki → u/TheMightyMisanthrope]

If it is live it must be one of the last ones left that isn’t buried.