Whilst helping mother sort out loads of old stuff from the the spare bedroom I came across these things that her grandfather and uncle made in WWI out of shell casings. I am guessing they are French 75mm. I believe US troops also used the 75mm.
There are three tobacco "jars" and a matchbox holder/ashtray.
A couple have Ypres engraved on them, one Messine and the other Vimy.
This one has the badge of the Royal Engineers on the front.