Found Film - Kodak Cresta Camera

Very first time this ever happened to me... I've found a half exposed film inside my newly acquired Kodak Cresta camera! 
Overall, the camera is really clean and  the film was probably the only one ever used...

I was very curious of what could've been photographed with the camera...and here they are!

 

It looks like it was a nice day out in family picking up some oysters...

Well... after some 50 years or so it was down to me to finish with the film...

 

Comparing to the family snaps my shots came out underexposed even though the sun was shining, quite strange because it looks like the weather was pretty bad at that time on the beach …

Since there are no settings on the camera and all the pictures were processed together I wonder why this could happen. Does the image once recorded on film keeps better preserved than the unexposed film itself ?

The film is the Kodak Verichrome and it was processed using Rodinal 10 minutes /1:50 dilution.