Sliver Uplights with Dimmer ?

Two uplighters. lights swivel to be in any position to suit. Both need new light bulbs and are a bit grubby from being in my loft. One has a dint to the casing on the top (this cannot be seen when the light is in position) see photo.Both are in perfect working order. There is a dimmer switch on both lights Corfe Mullen Area collection only