Repeating myself:
The ONLY thing to trust is what is ONSCREEEN in the movie itself.
Promo images are even more retouched that packaging shots. This image has obviously been color graded, the blade has been added, retouching is a given since it's a Vanity Fair beauty shot-- nothing about this can be trusted to be accurate.
No promo material, toy packages, or museum collection pieces should ever be considered as a guide because it has been proven over and over and over that they are not accurate.
We have to face the fact that unless the graflex has a great hero shot in the film, we'll likely be waiting for TLJ to hot Blue Ray before anything can be measured or confirmed.