Here we have a re-assembled shell for the famous 'Quick-Firing' 37 mm MAXIM GUN. Known as the POM-POM.

The dates on the bottom of the ...(Fired)...shell case tell us the story......They read......K  19   AUG   1918   Sp 255   119A.
"Quartermaster's Comment" The Maxim was a 'Dual Purpose' Quick Firing Gun......Often used on ships against Aircraft. This Shell is some 16 cms long and weighs in at around 550 grams. The Shell Head would appear to have been taken from a shell that had not been fired......(and is in very good condition)......but the base of the shell shows firing......in that the pin has struck the cap.
All Round a Nice Item.