Here is a 3rd box of all-brass 3.75" long electric-primed 12ga shells meant for EOD use in disruptor guns (on tracked robots). The cases in this are fired empties, but I was told they had a special water slug capsule which was used against explosive devices. The box is foil-lined and is dated Jul 1, 2001. It has English and French print on opposite sides of the box. I know very little about them - are they rare?