I tottally agree Rod,
But They did exist in 1915 & probably back to 1910. So thats what I state as definate fact. {Which people seem to want.}
But sure most are post 1920, Thats the opinion most of us have come to accept I think?

I think I may have even said the same to Mark & Andreas before?
I always wonder if the artilary shell cases from WW1 prompted the growth in the post war use of the brass bolster?
Spiral