|Held by:||Tyne and Wear Archives, not available at The National Archives|
The albums have been arranged alphabetically by type of equipment (boilers, cranes, electrical etc). Clarke Chapman have a system of numbering their photographs which consists of letters to identify the product, a running number, then numbers to show the year and month. For example, EW1389/6511 is an electric winch, photograph number 1389, November (11) 1965. These references have been included in the list.