SubjectOptical instrumentsItem typeObjectPhysical materialSteelCopper AlloyInventory No10940DescriptionCopper alloy frame with steel rod.Related ItemsMore related itemsPart of Optical Instrument?, by J. B. Dancer, ManchesterInventory Number 12667Optical instrument accessoriesInventory Number 15649Optical Instrument ComponentInventory Number 11235Optical Instrument on StandInventory Number 10858