Identify WW1 20mm shell casing?
Following are some photos of the shells:
I have tentatively identified them as 20mm HE shells but would like more information, such as manufacturer and probably use.
The first image shows both shells. They are 20mm in diameter, the brass casing is 70mm, the steel casing is 49mm and the head is 25mm.
The steel casing shows an A and what appears to be an exploding shell.
The other two images are of the bases. The letters at the top appear to be B &S but could be something else. I believe this is the manufacturer's mark.
The 18 should be the year of manufacture.
I have no idea what the 125 on the left means nor the numbers on the bottom which are hard to identify.
Any assistance would be appreciated because my friend, who is now 95, would like more information concerning the shells.