I saw the question Calculating the Size of Earth in the Apollo 8 Earthrise Photo in Astronomy SE and started to write a comment about those crosses when I noticed that I couldn't find them in the image.
The image can be found here: https://www.nasa.gov/centers/dryden/history/thisweek/GPN-2001-000009.html though I am not sure if this is as close to the original image as possible (there may be a proper archive site).
I don't see the crosses anywhere. I do see a pair of very faint lines that are parallel, one in each corner where the Moon's surface is visible, but they are tilted with respect to the edges of the image. I think these are just parallel scratches perhaps on the print or negative?
Question: Should there be black crosses from the Réseau plate in this Apollo mission photograph? If so, where are they?
below: Cropped, sharpened, and annotated detail from the full image (2nd, below) Image Credit: NASA GPN-2001-000009
Source click image or go there for full size view.