We found the end of a shell casing in our garden. We believe it is made of brass it’s 3.2 inches across and has the following stamps on it: DCP oo 75 M No 32 1917 BA with N on its side above.
Interestingly it also has flowers engraved on the sides
Any info would be much appreciated,
The garden is in Grantham, lincolnshire, UK. The house was built approx 1840s, We don't know much about previous owners, but intend to find out, to see if there is a link, which would be nice.