What is a XX7?

[Sndman77]

I have to agree here guys, with an XX7 stamped plate there is no need to look any further and no doubt (as long as chassis and tags numbers agree) about originality. Of course the other Sandman identifing factors in many cases satisfy owners/buyers of authentisity, but an XX7 stamp says Sandman... I believe that that this may have a bearing upon value if the prices soar (as I believe they will) in the future. If the Sandman's took a similar path as the GT's in value (probably since I've sold mine), collector and enthusiasts would be looking for and hold more value in the XX7 stamp.

Hi, I also agree with ozbox and Jeza
Especially if you don't know or can't find it past or histroy of owners.
As long the tag and chassis match up, always going to be a sandman.
I also feel if you have the right trim code, identification numbers, everything match's up (tag and chassis), even if you know the history or proof or it has other sandman features, with all these bits of identification together, it would be very hard to prove it not a sandman.
Personally xx7 and xu3 said everything, long everything else match up (tags hasn't been swap).

Bill