Some of the image files seem to be JPEG compressed TIFFs and are much smaller than the rest. This notebook just checks to file sizes to look for anomalies.
import os
MIN_FILE_SIZE = 50000000
path = '/webdav/Shared/ANU-Library/Sydney Stock Exchange 1901-1950'
for img_dir in [d for d in os.listdir(path) if os.path.isdir(os.path.join(path,d))]:
for img in [i for i in os.listdir(os.path.join(path, img_dir)) if os.path.isfile(os.path.join(path, img_dir, i))]:
if os.path.getsize(os.path.join(path, img_dir, img)) < MIN_FILE_SIZE:
print(img)
N193-055_0037.tiff N193-100_0318.tif N193-103_0352.tif N193-107_0351.tif N193-163_0415.tif N193-163_0427.tif N193-199_0005.tif