Thomas Firth and Sons Ltd: forging projectiles - 25-ton hammers, under which the heaviest projectiles are forged

Thomas Firth and Sons Ltd: Hammers used for forging smaller projectiles

Thomas Firth and Sons Ltd: hollow forging - vertical and horizontal hydraulic presses for punching and drawing projectiles and hollow caps.

Thomas Firth and Sons Ltd., East Gun Works - bogie annealing furnace for projectile forgings

Thomas Firth and Sons Ltd. , West Gun Works - annealing furnace, ready for annealing projectiles after forging

Thomas Firth and Sons Ltd., lathe, showing turnings from an armour-piercing projectile, illustrating the extraordinary toughness of the steel

Thomas Firth and Sons Ltd., West Gun Works - north bay of shell machine shops, in which the forgings are machined into projectiles ready for treatment by the secret process used by the company

Thomas Firth and Sons Ltd., West Gun Works - South bay Shell Machine Shop, where the shells are finished, fitted with caps and driving bands, etc

Thomas Firth and Sons Ltd., bond store in which projectiles are stored pending examination

Thomas Firth and Sons Ltd., examining shop, where the workmanship of the projectiles is viewed and inspected by official examiners of the various Governments supplied by the company