I am seeing MANY Duplicate images - Dutch Reformed batches

Often, photographers took duplicate images on purpose, in case of poor focus or difficult-to-read original images. Remember that many of these were taken MANY years ago with microfilm cameras that were not sophisticated. No autofocus, often in difficult lighting conditions. I have seen examples where it is obvious the page moved - I suspect sometimes the photographer was working in a room with an open window because the weather was HOT. With a little breeze, the page moved. So, he (or she, later) took an extra shot to be sure of having a good image for us to find all these years later.