It's a topic that's been well covered before but sadly in today's world, 'numbers matching' means just that...nothing about it being THE original motor. .
Reading ads these days, it's often best to forget what it says and just look for what's not said? .
My favourite is the 'correct restamp' term...what a great oxymoron! .
I think it's excellent how the seller has been up front immediately when asked and not tried to sidestep the issue...personally I'd prefer situations like this w/ the 'correct' motor but unstamped. .
~ Pete