This series can be broken down into four major subseries.
The first group (AA 290/14/1) comprises glass negatives.
The second group (AA 290/14/2) comprises nitrate negatives.
The third group (AA 290/14/3) comprises large format negatives (Includes sheet film, 5x 4 and 120 film).
The fourth group (AA 290/14/4) comprises 35mm negatives.