Flyingblind; Those photos were taken on a cheap Kodak belonging to Mrs Pinky which was given to her around 1980. It uses the standard 35mm film cassettes. The exposed films were developed and printed by a business in Port Moresby. ( Chin H Meen)
I have on occasion had reprints made here in Australia and the reprints for some reason have always been of superior quality to the originals.
Nevertheless, I suspect that your comment re the humidity has some validity!