Israel: Colored metal participation pin of the 1957 Arms Expo held in Haifa; size: 25 x 25.25mm; weight: 1.3g. With safety-pin back. The expo was one of the clear signs of jubilation in Israel following her victory in the October 1956 Sinai Campaign: the expo displayed various weapons used by the IDF in its successful campaign as well as captured Egyptian stocks. The expo opened on 29 April in Beit Dagan but moved to Haifa on 20 May and ended a month later; 70,000 people attended. The event's emblem incorporates the IDF emblem.