That is a photo of a croc named Krys - aka "The Savannah King". The beast was killed with a single shot in 1957 or 1958 (accounts vary) in Queensland.
Krys is not listed among the largest recorded crocodiles because nothing was reasonably recorded. There was no official measurement, and physical evidence and original photos obtained in the 1950's were lost in a flood in the 1970's.
As a result, Krys represents a very famous but officially disputed crocodile kill.
The surviving photo you posted is itself a source of cynical suspicion because it's obviously exploiting forced perspective to make the croc carcass look larger relative to the humans in the picture.
Context is everything, and one should consider the different timeframes reflected in the photos you've posted.
The earliest ones are Victorian-era photo cards - custom images, photographed in a studio, and often surreal by design.
The last two you posted appear to be 20th century press or publicity photos illustrating 'live action' in a 'real world' setting. The penultimate one I'd estimate to be from the 1930's, or maybe the 1920's. The most recent one is older, and might date back to the first decade of the 20th century.