[drc]

The stamps are usually reliable as period. However, it is true that news services might refile/catalog or acquire older photos from somewhere else and add their stamp on it-- so the stamp is newer than the photo. You sometimes see on a photo stamps from different eras, and obviously they can't both be period. It is not uncommon for a Culver photo to have a stamp much newer than the photos.

But the stamps are mostly period, especially for International News.