Bit of family history

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.

A bit of family history I found interesting.