I have a Crabtree 9 gang gridswitch which is a mixture of dimmers and switches. Must be pushing 40 years old. ;-) The dimmers were made by Home Automation and came with fittings for both Crabtree and MK grids.
Both the plate and the knobs are showing signs of wear, so since I've just decorated, decided to do something about it. The lacquer on the brass plate was poor so I've stripped that and re-done it which looks fine.
Bought new brass knobs (for dimmers) off Ebay - but they are designed to fit the standard D shaped 6mm spindles and most of the dimmers have 4mm round shafts. One has been replaced, and that has the correct 6mm spindle.)
All the knobs consist of a centre part and a cover which is in the brass finish. If I could separate the two, I might be able to fit the new covers to the old knobs.
Or any other suggestions? I have a few spare new knobs so don't mind experimenting.