1) Hand grenade of Poland 
Filipinka (also Wańka, Perełka) was an unofficial, yet common name for the ET wz. 40 hand grenade produced for the Armia Krajowa during World War II in occupied Poland. It was designed by a former worker of the Rembertów Polish Army munition works, Edward Tymoszak (hence the ET abbreviation). It was partially based on his pre-war design of an E...