Welcome and I'll have to say you're in good company here.
You are spot on with the 1974 determination of your machines birth as it has the twin ally plates which were issued around that year but not for too long until replaced by the single dual line ID plate.
Once again welcome to the ODK.
Cheers, BB.
I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.
