This is a 20-round sealed box of WWI surplus .303 cartridges with mixed headstamps that were purchased privately and converted to soft-point by cutting off the bullet tips, exposing the lead core. The ammunition was condemned by the Canadian government due to jacket separations in the bore. The lead core was exposed on both ends and squirted out. The box is full and sealed with imitation Dominion striped label. Apparently, the box is “very scarce.” I wouldn’t know.
It is currently (Monday 9 Feb, 3 pm) offered for sale at joesalter.com, “New Arrivals Today,” item 22942 for $245 USD. The listing also shows box end labels and back.