Curtis Canadian
This is a Curtis key HK-1. This was on a Curtis key rack that originated in Canada. Curtis Ind. Canada Ltd. Can't find it in my 1982 Curtis key book. What lock used this key?
https://imgur.com/a/mgak6WZ
https://imgur.com/a/mgak6WZ
'Gunter glieben glauten globen' Def Leppard, Rock of Ages, 1983