The large projects in magnets R&D create prototypes of the central solenoid and toroidal field coils. These are the highest field and highest energy coils in the ITER machine. Both use niobium-tin superconductor. Due to its brittleness the coil windings have to be made by first winding the conductor from strands of a matrix of niobium, tin and copper, heat treating to create niobium tin superconducting layers in the strand matrix, unspringing of the conductors to insulate the turns, the installation in their structure before final impregnation. The manufacture of the Central Solenoid Model Coil - L1 and the Toroidal Field Model Coil - L2 addressed these points. The L1 device continues to be used as a test bed for "insert coils". These can be inserted into its bore and used to test high field superconductors for ITER and for other uses.