During the 2nd World War anti-aircraft shells were made in their millions. This shell was made specifically for the Bofors light ack-ack (40mm) gun which was designed in Sweden and used by both sides.

Its capabilities extend to anti-aircraft and anti-surface warfare ... The programmable 40mm Bofors 3P ammunition enhances ...

The Bofors 40Mk4 is a compact and lightweight naval gun system designed for anti-aircraft and anti-surface ... The programmable 40mm Bofors 3P ammunition provides the naval gun system with the ...