key code

Hey Guys, I'm looking for the four-digit key code on my 1981 XS650. I know the older models had the key code stamped into the metal face of the ignition, right there next to the key slot, but the later models don't have the code there. Do you guys know where to find it? I've been...

I've got a surplus ignition switch that has 4 working keys, 1 original and 3 copies. In the first image, the surplus switch is on the right and is the shorter one. I removed it from a '76C. The taller switch on the left is the correct one for a '76C. From the code and images, can anyone...