Cool deal. Looks like you'll have to be one of those that lists their VIN or especially the month it was built if you know it. You've got the early reflectors, and electric side-marker lights were part of the '69 changeover process, along with vacuum to electric wipers and a few other things.
I think there's a thread here somewhere discussing that, but if not, let's start one.
If you don't mind posting your VIN in a public forum (tons of us do it actually) let us know what it is.
Thanks. And another welcome from here.
Paul