I found this while cleaning out my stuff and I think I got it while using my metal detector in Cornwall. I have looked online but I can’t find any identical headstamps. I am pretty sure it’s a 22lr shell casing and it measures 1.5 cm long and 1.65 cm wide at the widest part but apart from that I’m at a loss. I would be grateful if anyone could tell me anything else about it.
Hello there Zo.20, welcome to this Forum.
ICI stands for Kynoch Works, Imperial Chemical Industries Ltd., Birmingham, UK. On miscellaneous .22 cartridges as your case.
You can take a look at this site. You will find back “your” headstamp in the chapter England. Don’t be overwhelmed…