The limb is 89mm high and has a slot 17mm wide from the top which ends 7mm from the base and gives it the appearance of twin pillars. The limb is pivoted with trunnions at the top of the pillar so that the tube, objectives, stage, condenser and mirror can all be tilted. All surfaces except the mirror are painted black on brass. The condenser is nickel plated brass and is non-centerable. It has a thread which screws into a collar which forms part of the underside of the stage.
Movement is up and down only.
There is an iris diaphragm. The slide holders consist of two spring metal stage clips 35mm long. Around the edge of the circumference is a V-shaped groove to allow accessory stages to be secured with locating screws. There are two additional stages and are attached to the existing stage by first removing the stage clips and then placing them on top of it using pins and screws to lock them in position. The first one is a centring stage with its own stage clips fitted.