ZN458A Integrated Circuit - CUSTODIA: TO18 MAKE: Plessey

ZT82 Transistor Silicon NPN - TO18 - Ferranti - Zetex

ZT187 Transistor Silicon PNP - TO18 - Ferranti - Zetex

ZN404 Integrated Circuit - CUSTODIA: TO18 MAKE: Fairchild Semiconductor

ZN490 SemiConductor - CUSTODIA: TO18 MAKE: Ferranti - Zetex

ZT1583 SemiConductor - Standard Custodia - Ferranti - Zetex

ZTX500 Transistor Silicon PNP - TO226 - Ferranti - Zetex

ZTX301 Transistor Silicon NPN - TO92 - Ferranti - Zetex