Cylindrical slide rule with case and instruction manuals, Fuller, bakelite / wood / metal / paper, made by Stanley, London, England, 1916
Fuller-Bakewell type cylindrical slide rule for surveyors and engineers with cos.cos and sin.cos scales for stadia reduction.
Main scale somewhat marked with age and movement no longer free.
Originally used by the Municipal Council of Sydney - Electricity Department.
Testing Branch - Calculating Section