ASZ1015: PNP Germanium power transistor, 40 V, 6 A, 22 W, TO-3 packaging; 
Made by TUNGSRAM, Hungary, 1960s.
<a href="//commons.wikimedia.org/wiki/User:Mister_rf" title="User:Mister rf">Mister rf</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>