In 1985 and 1986, Turkey was the largest buyer of Swiss weapons. Pax Christi reports deliveries worth 356 million Swiss francs in 1984–1991. In 1990, Switzerland prohibited a shipment of 70 mm ammunition, citing human rights violations. In 1993, during military confrontations in the Kurdish regions, Turkey was a major buyer of Swiss armaments. From January 1991, Oerlikon-Italiana supplied 25 mm cannons for Turkish armoured vehicles under a deal covering 75 units. In January 1993, 60 units were still outstanding. Handling the transaction through the Italian operation was linked to Switzerland’s arms embargo on Turkey. The Turkish company Çansas manufactured 35 mm guns under licence from Oerlikon-Bührle. A Contraves licence enabled Aselsan to manufacture gun electronics. These manufacturing capabilities existed around the time of Switzerland’s 1991 export bans and enabled Turkish production using previously transferred technical knowledge.