The sub fonds mainly covers the 20th century. It includes records used to record the building, movement, repair and condemnation of stock including files covering experiments carried out on site (WOLV 4/9). The sub finds also includes minutes that describe production techniques and programmes (WOLV 4/11) A large part of the sub fonds relates to accounting and finance (WOLV 4/8) this contains records relating to piece work and pricing of different activities. This series also includes records that show how components were priced (WOLV

4/8/2) and records recording budgets (WOLV 4/8/3).

WOLV 4/1 Volumes recording Weights (1880’s-1930’s)

WOLV 4/2 Renumbering of Carriage Stock volumes/registers (1909-1930)

WOLV 4/3 Volume Recording Steel or Iron Used (underframes) (1910’s -1920’s)

WOLV 4/4 Building programme records (1915-1964)

WOLV 4/5 Works Books (1918-1928)

WOLV 4/6 Equipment/Machinery files (‘D’ Series) (1925-1974)

WOLV 4/7 Repair records (1925-1981)

WOLV 4/8 Accounting and Finance (1932-1973)

WOLV 4/9 Experiment files and registers (1938-1965)

WOLV 4/10 Condemnation records (1945-1960)

WOLV 4/11 Minutes (1951-1985)

A full listing can be found on the National Railway Museum website under 'Archive Lists' at https://www.railwaymuseum.org.uk/research-and-archive/further-resources/catalogues.