A box of cellulose acetate film from Great Western Railway/British Railways Western Region N

A box of cellulose acetate film from Great Western Railway/British Railways Western Region N/A photographic unit, DP Series - Documents (Copy Negatives of Drawings from 1840s-1880s) with negative numbers DP: [1] 1-64, [4] 1-24, [6] 1-23, [7] 1-21, [8] 1-23, [9] 1-15, [10] 1-27, [11] 1-40, [12] 1-30, DP: [13] 1-26, [13A] 1-25